Ok, as a variation on the assassins gangbang, how about, Bucky escapes on the helicopter, takes Zemo to Siberia. They activate the other Winter Soldiers instead of executing them. They fight for the red book and manage to destroy it, and then they all turn on Zemo and proceed to rape him.

+1000000000000000 if one of the Winter Soldiers is actually female. Pretty sure she was Scarjo's stunt double.