Here are the 12 most powerful mutant heroes to ever join the Avengers, ranked according to the extreme damage they can deal ...

Rehgar pulls the weight in this team comp while Illidan just continues ... There are plenty of other heroes that synergies with each other, but these are the most powerful two-person combos that come ...

The Guardians of the Galaxy ... even more powerful potential new members. The Guardians of the Galaxy, meanwhile, had no such set-up and comprised a team of far less well-known heroes.