I don't think Brock matches up well with the Reem. He will be able to stuff the shots, because he doesn't have to respect Lesnar's striking. I can see a knee to the head, as the beginning of the end in this fight.
I am interested to see if Overeem will follow him to the ground, or make him stand back up when he is on the mat. Brock off his back, doesn't exactly have the same connotations as it does with Werdum. So, Overeem may be confident he can gnp without much threat.
Huge fight for cowboy, let's see how he handles the pressure. It would be fantastic, if every fight came down to just fighting ability and physical attributes. But sometimes, the pressure cooker is the hardest opponent a fighter faces.