I'm a big fan of the 1988 arcade game Splatterhouse. It feels like Jason Vorhees replacing Bruce Campbell as the lead in Evil dead II.
How would Jason have gone against headless chainsaw wielding Linda, Evil Ed, Henrietta and the tree creature?
Also I'd love to see :
Predator vs Na'avi (James Cameron's Avatar)
Critters vs the Killer Klowns
and YOU?