I don't know if I want a WWF RPG exactly, but I would like a d20 game that is set in a world of grapplers. Where the storylines are real, and we players create the script for our grappler characters as we go along.
Cheesy, but I think it's kinda fun to play, especially when you have classes like:
Grappler
Manager
Promoter (think Vince McMahon)
Then you have NPC classes like:
Valet (mostly hot chicks, but can be for guys in world of girl wrestlers)
Groupies (hardcore fans of a wrestling stable or organization)
Officials
Roadies (those who work behind the scene, may also includes the announcers who calls the play).