They could use Antonio Silva and maybe even Brett Rogers (he can just keep talkin shit about Kimbo, that'll sell lol) in UFC just because the HW division is so lacking. Jake Shields has ZERO standup game, he's gonna get worked in the UFC. Robbie Lawler was another name brought up, but I think he already had one unsuccessful stint in the UFC.
They should also sign Kimbo Slice, but just to set up a Kimbo dunking booth on the side for the kids.