In fact, captain America did not return immediately after returning to the past and returned the Infinity Stones, but chose to stay in the past, many people should be very incomprehensible, Dr. Banner once said that changing the past does not change the future, if Captain America has not appeared until it is good to explain, it proves that Captain America is indeed stuck in the past, and there is no Captain America in this time and space.

But then Captain America, who should have appeared in the quantum tunnel, appeared on the chair by the park lake, which made many people feel a little confused, if Captain America came back from the quantum tunnel, then he should not be old, if Captain America did go back to the past and lived with Carter for seventy years, and has continued to the present, then what did we see Captain America before?
What happened to this suddenly elderly Captain America and Captain America who had previously returned the Infinity Stones?
<h1>Time complex line and time single line</h1>
As we said above, the elderly Captain America did indeed live with Carter for seventy years over time, and lived with Carter for decades until carter died, and he did not travel from the past to the present, and there is a basis for this claim.
There are many ways to explain the timeline of science fiction movies about crossing the plot and involved, just take the marvel movie involving the timeline, so far there have been two statements, one is the X-Men series of twentieth century Fox, and the other is the "Avengers 4" that we need to discuss at present, in "X-Men: Reverse Future" it involves the problem of timeline, and the treatment method in this is also very straightforward, that is, changing the past can change the future. This also directly caused the X-Men series to go in two directions since "Reverse Future", and before reversing the future - what happened after it has become irrelevant.
We can call this situation a "single line of time", that is, changing the past changes the future.
And the situation of "Avengers 4" is much more special, according to Dr. Banner's latest theory, the future is "development and change", if you go back to the past, then this past is your present, your future has become your past, the past has become the future, you change the past and will not change the future, it may sound a little complicated, and some are more difficult to understand, but you calm down, you taste, you taste, what does this statement represent?
Before this situation, Doctor Strange also gave us a hint direction, that is, the future that Doctor Strange saw on Titan was not a single, but a "diversified" structural development, as long as it was slightly different, the result was very different, since the future was "development and change", it proved that the timeline of "Avengers 4" was a "double line", and the timeline caused the appearance of the elderly Captain America.
<h1>The relationship between the elderly Captain America and the young Captain America</h1>
I mean "old age and youth" here refers to appearance, not age, if calculated according to age, then the age of the elderly Captain America sitting by the lake and the young Captain America who returned the Infinity Stones are actually the same, one survived in the ice for seventy years, one lived in the outside world for seventy years, do you say they are the same person? In fact, if I were to say that they are the same person and not the same person, you may ask, is this not a contradiction in this statement?
But is this statement really contradictory? In fact, we can extrapolate here, we assume that Captain America returned to the past and returned the Infinity Stones and immediately returned to the past to find Carter, completed the regret in his heart, accompanied Carter for a lifetime, and then naturally appeared in the chair by the lake, but this statement is obviously problematic, if Captain America has been accompanying Carter, then how can we explain captain America that we saw before?
Captain America has always been thinking of caring for Carter, he was frozen for seventy years, and when he woke up, Carter was already dying, he had never accompanied Carter, he went back to the past to make up for his promises made seventy years ago, did he feel a little confused here?
Since Captain America hadn't lived with Carter for seventy years, what about the elderly Captain America we saw? If Captain America lived with Carter for seventy years, what about the frozen and resurrected Captain America? And the latter seems to be the plot we see.
<h1>Captain America's crossing produced parallel universes</h1>
In fact, this situation has appeared since the time when the Avengers went to collect the Infinity Stones, and the past they returned to was not the past of the current timeline, but the past of another parallel universe, and each time they crossed, a parallel universe would be derived, which coincided with the "branch timeline" theory of the ancient mage, which means that changing the past does not change the true situation of the future, because the past you return to is not the real past at all.
In fact, it is very simple to say, after Captain America returns to the past to return the Infinity Stones, he appears to cross to the point in time before he left Carter, then this is equivalent to opening up another parallel universe, we see Captain America disappearing in the quantum tunnel platform does not appear, he has been in that parallel universe with Carter.
So can we understand that Captain America went back in time to accompany Carter, and at the same time, there was a captain America already frozen at this point in time? Seventy years later, captain America awoke to find that Carter was dying and that he was still young, but he did not realize that there was already another self who had made up for the debt.
According to the plot we have seen, since the elderly Captain America who appeared by the lake has been living for seventy years, then the Captain America we see is the one frozen, he knows nothing, and he wants to make up for his own debts, but he did not think that there was a person who had already lived in secret, he knew everything, he came to make up for his debts, and at this point in time, we saw two different Captain Americas.
The elderly Captain America traveled from the future, and he accompanied Carter for seventy years, and at the same time he knew that he was frozen, just as we now see Captain America in 2023 going back to 1941 to accompany Carter, but there was also a Captain America who was also frozen at that time.
If Captain America had lived in that parallel universe for seventy years, then he would have become the elderLy Captain America, then after the appearance of the frozen Captain America, according to the development of the timeline, he would certainly experience everything we see now, even the final "endgame", and finally the frozen Captain America returned to the past, and the elderly Captain America appeared in the chair by the lake, and this elderly Captain America was the Captain America who crossed over to the past.
See here let's take a look! According to the above statements, the elderly Captain America by the lake is really living for seventy years, then he is not captain America who participated in the "endgame", and at this point in time, as I said above, there are two different Captain Americas.
Time seems to form a "loop" here.
<h1>In the chaotic timeline, Captain America may not have more than two, but three coexisting. </h1>
In fact, if we look closely at Avengers 4, we will find that at one point in time, three Captain America coexist in one space, and this situation occurs twice.
1. The two Captain America appeared at the same time, after getting the Psychic Scepter, Captain America met his self in 2012, and even fought once, in order to get rid of his past self, Captain America had to say in advance that Bucky the Winter Soldier was still alive, and at this time there was Captain America hidden in the dark, he accompanied Carter for seventy years.
2. After the failure of Iron Man's Space Gem Project, in order to find a new time point to get the Space Gem, you also have to get the Pym particle to go back to the present, and this time point is New Caesar in 1970, when Captain America and Iron Man from 2023 appeared, There was Captain America who was frozen, and Captain America who returned to 1941 from 2023 to live with Carter.
Three different Captain America came from different time and space, and at one point in time they came together again, but they did not interfere with each other, the elder Captain America knew the existence of Captain Ice, but he did not choose to appear publicly, or even choose to hide, about this we can actually see from "Captain America 2", that is, what Carter said when he met Captain America, and the photo of Carter's bedside.
Carter's relationship with Captain America is real, but through the photos on Carter's bedside table, we can see that Carter has been married all these years, so who is her child? Who is her husband? None of this Carter has said or mentioned it, but through some small details in the film, we can tell that this person is actually Captain America, who has come from the future to the present.
Summary: The old Captain America did not travel to the present, he did live with Carter for seventy years, but at the same time, we can also know the existence of another Captain America, according to the theory of "Avengers 4", changing the past does not change the future, Captain America returns to the past is another parallel universe.
Text: Film and television gossip (original)
Figure: All from the network