Helmut Zemo the prime villain of Captain America: Civil War is absent from the MCU since he was imprisoned by Black Panther. He was a grieving man who turned to the dark side to deliver vengeance against the people who were responsible for the death of his family in Sokovia battle against Ultron.
When he succeeded in his plan to corrupt the avengers he was stopped by Black Panther before committing suicide. He did not possess any superpowers but his evil genius mind was enough to make the Earth’s best defenders fall apart.
Zemo is gone for a while in incarceration and only he knows where he was in the events of Infinity War and Endgame
There are a lot of questions to be answered. Where was he all this time? Whether he disappeared in Infinity war saga? What is the next plan? and how much has he changed? All the questions will be answered when he returns in the online streaming of “The Falcon and The Winter Soldier.”
It will be very interesting to find our what Helmut Zemo has turned into now and how did the escape the heavily guarded prison. With Iron man and Captain America gone, he would have the advantage I guess.