Doctor Strange In The Multiverse Of Madness Ending Explained -- Here's What Happens In The Post Credits Scenes

gamespot.com:

A lot happens in Doctor Strange in the Multiverse of Madness, which probably will be the furthest thing from surprising for anyone who has been paying attention to the movie's marketing campaign. The trailers promised a universe-hopping explosion of different possibilities and realities and, yeah, that's pretty much exactly what happens. But along the way we're also treated to some new character introductions--like America Chavez, who has the ability to cross dimensions at will--and some new versions of more familiar faces, like an evil, terrifying version of Strange himself. But what actually happens in the movie and how do things end for our heroes?

We're going to break it down right here, right now. Massive spoilers to follow, so please proceed with caution.

The Multiverse, Explored

After being sent to a final alternate reality (this one isn't numbered or named--everyone, or almost everyone in it, is dead) by America, Strange and alternate Christine are forced to confront an evil, alternate Strange for use of the Darkhold and a way to make contact with Strange's home universe to save America from Wanda. Things, unsurprisingly, do not go well but eventually Strange is able to use the book to «dreamwalk» and project his consciousness into the body of the dead Doctor Strange that America initially brought with her by accident when she first arrived. That's right--it's a Marvel Zombie but also not a Marvel Zombie at all. This Strange is only undead in the sense that his body is literally rotting, otherwise there's no relation or connection to the What If…? Episode.

Corpse Doctor Strange manages to travel to Mt. Wundagore to interrupt Wanda's attempted murder of America, which America herself eventually stops by showing