While not every villain has a deep backstory, there are plenty that do. Some of the biggest baddies in Marvel comics, from Doctor Doom to Thanos, have legitimate points they’re trying to make.

All sorts of questions swirl around the role Namor the Sub-Mariner will play in Avengers: Doomsday. In the case of most of the characters confirmed for the fifth installment in the Avengers series, ...