Litleo/Pyroar!! I was really hoping when Litleo first got revealed that it would evolve into a manticore themed Pokemon, the potential is all there, its Roman centenarian looking mane, it's tail tuft that looks like a stinger... When we got plain ol' Pyroar I felt a little underwhelmed, a third stage with a mythology theme would be amazing! though I doubt we'd get it, shifting the normal typing to poison upon evolution would also be pretty sweet and fit with the manticore theme