This may come as a shock to you, but my 'fic-bunny involves Derren Brown being really, really evil. It's also very Firefly-heavy, which may be rather unfortunate for you... but don't worry! There's Supernatural in there as well (Derren doing a Heel Face Turn in order to help Sam and Dean out with a Big Bad who turns out not to really be one anyway).
Oh yeah, and it's set in an AU where humans and Toons exist in the same 'verse, which was ALL DERREN'S FAULT, BECAUSE HE OPENED UP THE VORTEX BETWEEN THE WORLDS BY ACCIDENT. The Animaniacs, Dream of the Endless and Daria end up in there somehow, as well as a few Pokémon.

I hope I'll be able to do this as well as my original fiction story, which is really taking over my brain at the moment...