I think CBS doesn't want two potential 5 round fights on the same card, the last EliteXC went like an hour past schedule and they were pissed about it.
And Mo fucked up his knee in the Kerr fight, no idea how. Filho's fighting Dong Sik Yoon at the next Dream, I wanted to see that too.
Mousasi fighting Sok is better than fighting Whitehead or no one at all, imo.