In the fourth phase of the Marvel Cinematic Universe, efforts will be made on the multiverse.
And the mysterious Doctor Strange: Crazy Multiverse may be the climax of this stage.

The sequel movie ensures the return of several leading actors in the previous work, and the love of Ao Mei'er (the witch) joins.
In terms of new roles, "Miss America" Amerika Chavez, played by Xousslier Gomez, will make her debut.
Rachel McAdams played nurse Kristen Palmer in Doctor Strange.
He provided crucial help to Strange at critical moments and developed some ambiguous relationships with him.
But then I never saw the character appear again.
Rachel will still appear in Doctor Strange 2, so fans are curious about her relationship with the Supreme Mage.
Screenwriter C. Robert Cargill recently answered this question from fans via Reddit.
"They've gone their separate ways, and they've become escapees from the relationship."
The screenwriter also made a point in particular.
"He spent so much time on magic that worldly things were left aside. He must constantly be pulled back to reality, reminding him that small things are just as important. ”
As for how Strange and Christine's relationship has become years later, "Doctor Strange 2" goodbye.
Another screenwriter, Michael Waldron, described the film as "incredibly visually stimulating," while also noting that the sequel movie would be unlike anything you'd see in the MCU.
Doctor Strange: Crazy Multiverse is scheduled to be released in North America on March 25, 2022, making it the first MCU film to be released next year.