So, from Batman Week on Area 221 (two weeks ago), The Great White Shark was probably my favorite to illustrate. That might have been because I never heard about this new Batman rogue until that week and because I had the most fun drawing him.
I decided not to have him aiming the gun at you. I know he's criminally insane after going into Arkham normal (and exiting nuts). There's something that's more intimidating about not having to stare down a barrel, though. (Maybe I'm thinking more Two-Face than Great White Shark.)
The process was quite fun, since I like dressing up and holding toy guns from my younger years.
The Great White Shark - http://en.wikipedia.org/wiki/Great_White_Shark_(comics)
Area 221 - http://area221.blogspot.com/