Board Thread:General Discussion/@comment-26190625-20161126164942/@comment-29523873-20161130234341

Spawn and Sub-Zero are guest characters, characters from other franchises. The Watchmen are just from a different universe, but still under the DC umbrella. Plus, one of the Watchmen, Dr. Manhattan, is responsible for bringing about the new reality in the "Rebirth" comics, so they're not really that far-out characters to have in a DC fighting game.