20 Moments That Will Define Upcoming Marvel Movies

8. Hulk Battles The Hulkbuster (Avengers: Age Of Ultron)

The reason this moment will be so defining in Avengers: Age of Ultron is because we don't currently know what the circumstances of the fight are and it could send the movie in one of two major directions. Has the Hulk gone rogue, so Iron Man is wearing his Hulkbuster armour to combat him? In which case, the Avengers have a whole new problem to deal with, as one of their own members - and one of the most powerful - turns against them. Or, alternatively, has Ultron taken control of Iron Man's armours remotely in order to use them for his own evil means, in which case the Hulk is merely protecting Earth from an army of rogue Iron Man armours that happens to include this one? Either way, when it comes to light what's going on, it will be a pivotal moment in the movie.