Source: reelworldtheology.com

1. Baron Zemo

Baron Zemo is a phenomenal villain. Thankfully, they left him alive at the end of Captain America: Civil War.

Although he’s locked up under heavy lock and key, the Sokovian baddie still has the ability to do some damage. I’m hoping that if that happens, he’ll put on that sweet purple mask.

Or maybe a different costume? Maybe he can come back as Citizen V. Maybe we can get some Justice Like Lightning. MCU Thunderbolts would make up for every flaw in the film series. Plus, it might mean that we’d see a good Thunderbolts comic again, something that hasn't happened since, like, 2014. Charles Soule's run, I think? Yeah, that sounds about right. Anyway, Zemo and Thunderbolts would be a match made in heaven.

So there you have it: ten villains who could return if Marvel wanted to do that sorta thing. Hopefully, some of them will pop up sooner rather than later.