3. Iron Man
Who would win in a fight between Captain America and Iron Man? That will be revealed in Civil War next year, but Tony Stark definitely has the advantage. His powerful suit of armour has been upgraded again and again since 2008's Iron Man, and the latest trailer revealed yet another one which this time closely resembles his Bleeding Edge comic book armour. Tony Stark might be a normal man inside his various suits, but what he can do with them makes him a serious threat to both his enemies and fellow teammates. The fact that he will be suiting up in the Hulkbuster armour (which houses multiple arc reactors) turns Iron Man into an even greater threat, but chances are it won't survive its encounter with the Hulk...