Which DC heroes might show up in James Gunn's upcoming movie Man of Tomorrow? Some cast members may have just given us all ...

The first movie in this burgeoning shared universe was Superman, which featured a number of other heroes. That includes Nathan Fillion's Guy Gardner, who is a bad boy of the Green Lantern Corps.

Not exactly an ideal position to be in, right? Green Lantern: The Animated Series was full of strong character development, cohesive storytelling styles, and some surprisingly mature themes.