DC Villians Joker*** Harley quinn *** Brainiac Two-Face** Icicle Killer Frost Parasite Cheshire Maxwell Lord Jason Todd (red hood) ** Scarecrow ** Felix Faust Black Adam darkside
Heroes
Martian Manhunter Captain Marvel ** flash** Green lantern*** scott free***
Marvel
Villains Madame Masque Tiger Shark pyro Crossbones** Count Nefaria Jigsaw Norman Osborn All the marauders from sinister's crew bastion*** Greydon creed anyone from the friend of humanity Styker (from the comic or movie) Apocalypse Selene Gallio (black queen) Miss sinister
Hero's Professor X (with or without the wheelchair) Thor Angel
Angel/Buffy Whesly Fred Conner Wesley Wyndam-Pryce Dawn Summers Willow Rosenberg Spike Lorne ANYONE from Wolfram & Hart
Torchwood Owen Harper Gwen Cooper The Master The Doctor
Heroes Heroes/Villians Sylar **** Jessica Niki Mohinder Elle Tracy Flint, Jr.Gordon Arthur Petrelli Knox
other fandoms are more than open and even more than welcome :)