Doppelgangers. They are strange creatures. Besides that one comic with Alucard, I hadn't really done anything with them. Far as I'm concerned, every good (or bad, if you aren't that huge a fan) comic, book series, movie series, etc. needs an evil clone/twin/etc. It's fun, and if you're good, you can do something new and interesting with the concept.

After this, I'd have to do alternate realities... Although, what would I do? A Richter that was actually an effective hero? I gasp at the thought.
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.