The Marvel Cinematic Universe is finally shifting to Phase Four, and that means the various heroes of Black Widow, The Eternals, Shang-Chi and the Legend of the Ten Rings, Thor: Love and Thunder, an untitled Spider-Man sequel, and Doctor Strange in the Multiverse of Madness will have to face off with some serious enemies.
Thanos already killed half the Marvel Universe, so any big bads from the MCU's Phase Four are going to have to be just as dangerous. After all, Thanos is a great character, and while Marvel does have some of the comic book industry's greatest villains, Thanos is a tough act to follow.
Fortunately, there's room in Phase Four, and heroes like Thor, Doctor Strange, Spider-Man, and the rest of the gang that's moving forward in the MCU have some of the best rogues' galleries. There are tons of potential bad guys for Dr. Strange to fight it out with in his next sequel, but who that will be is anyone's guess.
After looking at all the heroes Marvel and Disney have acquired, and plan on creating movies for, there are numerous possibilities where villains are concerned. Not all of these ten bad guys have been confirmed, but there's a good chance they will find their way into the MCU soon enough.