The only antagonist to hand the Avengers a crushing defeat before Thanos snapped his fingers, Helmut Zemo (Daniel Brühl) is a Sokovian special forces officer — and, as we find out later, a baron — who's out to avenge the death of his family in "Avengers: Age of Ultron." He achieves this with a carefully laid-out plan that sets Avenger factions against each other in "Captain America: Civil War." This act effectively disbands the original Avengers team until their last hurrah in "Avengers: Endgame."
Apart from being a noted dancer, Zemo is a magnificent and tactical opponent. His motivations and inner anguish are clearly laid out, which would make him a worthy successor to Erik Killmonger (Michael B. Jordan) and Namor. He also has a very complicated history with Wakanda, since his "Civil War" plot is responsible for the death of Shuri and T'Challa's father, T'Chaka (John Kani). As such, while T'Challa was ultimately happy to send Zemo rot away in prison, there's likely a whole bunch of Wakandan people who'd like to have a word with the baron.
