It will be Spider-Man: Far From Home, not Avengers: Endgame, that technically marks the end of the Marvel Cinematic Universe's Phase 3. But Endgame effectively wraps up the story of numerous characters and storylines that have spanned the past decade. So where do things go from here?
We have some insight into Phase 4, but that's primarily just knowledge that certain movies--Guardians of the Galaxy Vol. 3, The Eternals, a standalone Black Widow film--are in development. In terms of the next Thanos-style villain that will lord over multiple movies, Marvel has not said anything officially.
But with various hints and our knowledge of the comics, it's possible to make some guesses. Check out the video above for a look at 10 possible villains who could be the next major threat in the MCU.

https://www.gamespot.com/videos/afte.../2300-6449332/