12 Biggest MCU Characters Without A Confirmed Return Date

12. Zemo

When Zemo made his MCU debut in Captain America: Civil War, he was incredibly well received as an outstanding villain. The overarching confusion that was his plan may have let him down somewhat, but as an antagonist to the Avengers, he was completely unique and terrifying in his own way.

It wasn't until five years later that he reappeared in the franchise, having been broken out of prison by Bucky in order to help track down the origin of the super soldier serum. He was a much different character here, and yet to many an improvement.

His grudge with the Avengers was understandable, as he holds them to account for the death of his family, and despite being sent back to incarceration with the Dora Milaje, there is no reason to believe he is done. He even said it himself that he plans to continue his work to eliminate those with special abilities and powers.

His return is most likely to take place either in Captain America: New World Order opposite Sam Wilson, or Thunderbolts potentially working on the same team as Bucky Barnes and John Walker. The latter is arguably the better fit, thanks to his connections to the team from the source material, but who is to say?