Batman (you need experience to deal with the Joker)
Superman (his array of superpowers would be needed)
Deadpool (need some sarcastic comments to keep it interesting)
Dr. Strange (time and dimension manipulation)
Spider-man (More sarcasm? Why not)
Vision (Superpowerful AI with almost indestructible body)
Hulk (Hulk vs. Bane? Yes please)
Iron Man
Captain America (Not gonna lie, Stark and Rogers make a great team despite their differences sometimes)
Batman (Experience of both Bane and Joker)
Hulk (The big guy is always useful, especially depending on what sort of Bane we're up against)
Black Widow ( Erm..... because #reasons )
Superman (If this fight is on Earth, which it probably is, his powers will be useful)
Catwoman (The Pfeiffer one! Because...... #morereasons)
Thanks for the giveaway, even if I am getting beaten up 7 on 3!