Justin Hammer could come back seeking revenge as a key villain in Captain America 5 ... with Sam Wilson trying to stop both ...

Not all villains in the Captain America universe are superpowered ... As terrifying as Zemo can be thanks to a show-stealing ...

Of course, there is Steve Rogers and Bucky Barnes, those that Zemo (Daniel Brühl ... essentially the Soviet Union's equivalent to Captain America, and though things didn't work out as well ...