Fan CastingUltimate Avengers 3

When Black Panther is assassinated at a meeting between the biggest world leaders by a man calling himself the Winter Soldier, the Avengers tack him down to Siberia where he and Baron Zemo are being held up underground after the elevator brakes. Captain America and Antman eventually manage to get into the underground base and take down Zemo but the Winter Soldier shoots and kills Antman which leads Captain America to kill the Winter Soldier but when he checks the body he sees that the Winter Soldier is actually his childhood friend Bucky Barnes who had supposedly died in World War 2. The movie ends with all the Avengers showing up to Antman's funeral while Captain America has a conversation with Green Arrow and Daredevil about tracking down the Winter Soldier. Its revealed that when Captain America saw it was Bucky he took both bodies to the surface but when he put the Winter Soldier's body in the snow and went to put Antman's body down he turned back and Bucky was gone.