13 Most Shocking Comic Book Movie Twists Of All Time

13. Bucky Killed The Starks - Captain America: Civil War

For some, Captain America: Civil War's greatest twist may come in the revelation that Zemo's villainy is all a personal story of revenge, but a single strand of his plan is even more devastatingly effective in changing the pace and trajectory of the plot.

Having realised that Zemo framed Bucky for the Vienna terrorist attack, Tony Stark appears to change allegiance, striking a truce with Cap and Bucky only for it to be revealed that this was Zemo's plan all along. He had trapped the three key players in a final confrontation and fed in the catalyst of footage showing that Bucky - or The Winter Soldier, since it isn't fair to consider them the same personality - was behind the murders of Stark's parents.

It's like watching the shortest fuse ever being irreversibly lit, and Robert Downey Jr's performance as this point, and during his fight with Bucky and Cap is the crowning glory of the quite wonderful scene.