10. Captain America Will Return From The Dead
At the end of the Civil War comic book, Captain America surrenders himself to the authorities and is taken into custody. Presumably, the events of the movie will follow the same chain. It was in Captain America #25 (an epilogue of sorts) that Steve Rogers is gunned down and killed by Crossbones, and rumour has it that the Star Spangled Avenger will go out in the exact same way when Captain America: Civil War is released next year, particularly as Crossbones has been confirmed. How it happens isn't clear, but Cap will apparently return in Avengers: Infinity War Part 2. It's not hard to imagine the Infinity Gauntlet being used to restore him to life so he can lead the team into battle against Thanos after they reportedly fall in the first part. Marvel have undoubtedly been holding back the "Avengers Assemble!" line for this moment too.