I don't want to see this happen, nor do I think it ever would.
I recall Dana saying that Pride putting Wanderlei in the ring with Cro Cop was the dumbest thing they've ever done, so I'm pretty sure he would veto it.
HW - Randy "The Natural" Couture
LHW - Mauricio "Shogun" Rua
MW - Anderson "Spider" Silva
WW - "The Prodigy" BJ Penn
LW - "The Prodigy" BJ Penn