If Kimbo had any semblance of a ground game, he probably would have been a lot better off, although having a 270 pound BJJ black belt on top of you like that is certainly not an easy thing to escape from. Do keep in mind that Roy Nelson tooled Frank Mir 15-2 or something like that in a BJJ competition, so he's definitely no slouch on the ground.
That being said, I'm pretty sure Kimbo will be back, and might even somehow find his way into the finals. But it all comes down to the matchup. If he gets a striker, he'll probalby do pretty well, but a wrestler/bjj artist is bad news.