I think they should just make a movie about Methos, but I understand that Really Old Guy Who Is Seriously Awesome But We're Not Quite Sure Where He's From is a less catchy film title.

Hee! I read a fic once in which Methos claimed his name meant something like "Scrawny Big-Nosed Boy We Found Under a Rock on the First Night of the New Moon." A bit catchier, perhaps, but still not a movie title.