You know what I'd really like, maybe not the next fight but somewhere down the line? Kimbo Vs Chuck. Two brawling KO artists. With Chuck not quite elite level any more and Kimbo below it too, it would be a bangin good fight. Plus I think they're not too far in the weight difference, and Kimbo's up there in age too. That is if Chuck isn't retired for good.
Plus I remember Chuck sort of calling out Kimbo when he was getting all this hype in Strikeforce and Chuck was still top of the heap in the UFC, something about Kimbo "beating up bums behind taco bell". Could be some nice bad blood there too, and think of the PPV numbers these two guys would pull.