While they once held prominent places in superheroes' supporting casts, these minor side characters have either disappeared or changed completely.

From the devilish villain Mephisto to the heroic Power Pack kids, many of Marvel's underrated characters deserve their chance ...

The X-Men have grown from Marvel’s least popular Silver Age team to one of the most popular superteams of all time. There was a long period when Marvel’s merry mutants were the top of the sales charts ...