The Marvel Cinematic Universe has introduced a lot of different villains over the years. Although many of those bad guys have died, there are quite a few that haven't, especially those appearing in Phase Three. As the MCU prepares to start Phase Four following Avengers: Endgame, there's a chance that some fan-favorite villains might make their returns.

Although a lot of these villains were left with uncertain fates following their most recent appearances, there's a lot to indicate that they might come back. Mordo, for example, is almost certain to play a key role in Doctor Strange 2, which could start filming this year. Others were teased in the post-credits sequences of films like Spider-Man: Homecoming.

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Check out the video below to find out which MCU villains are still lurking around.

Whether these villains return for future films in the MCU remains to be seen. Some of these villains will almost certainly return in one form or another. It's entirely possible that they may have short cameos, like Red Skull/Johann Schmidt in Avengers: Infinity War. The return of those villains may be tied to Thanos' snap, which is certain to have changed the world, even if it does end up getting undone somehow in End Game. Thanos might even end up surviving the events of Endgame, which would mean that he could still pose a threat of some sort in the future.

The upcoming Captain Marvel solo film proves that death doesn't necessarily mean a villain won't return, as that movie will see the returns of Ronan the Accuser and Korath the Pursuer. As there are seemingly plans to have other films set in the past, it's entirely possible some villains will return.

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