The other Winter Soldiers aren't dead when Steve and Bucky get to the bunker. They're waiting. And they beat Bucky down and hold him to the ground while Zemo reads off the trigger words again, and then all of them--including Bucky--pile on Steve in a mercilessly violent gang-rape.
Bonus: Tony and/or T'Challa get there just as the trash party's getting underway and have to watch the whole thing through whatever observation window Zemo was hiding behind, frantically trying to fight their way in the entire time. (Eventual rescue and hurt/comfort would be the icing on the cake, of course, as long as they don't make it in before the original Winter Soldier has had his brutal way with Steve.)
Bonus #2: The gang-rape is actually more like a brawl at times, because Steve just will not stop fighting. After a point it's not even to defend himself anymore, it's to try to spare Bucky the memory of doing this to him.
brainwashed!Bucky + other Winter soldiers / Steve gangbang
Bonus: Tony and/or T'Challa get there just as the trash party's getting underway and have to watch the whole thing through whatever observation window Zemo was hiding behind, frantically trying to fight their way in the entire time. (Eventual rescue and hurt/comfort would be the icing on the cake, of course, as long as they don't make it in before the original Winter Soldier has had his brutal way with Steve.)
Bonus #2: The gang-rape is actually more like a brawl at times, because Steve just will not stop fighting. After a point it's not even to defend himself anymore, it's to try to spare Bucky the memory of doing this to him.