From what I saw of Shane last time out, he is done. I'm about the only one on this site who thinks this, but he had terrible trouble with Mayorga and one punch saved his reputation. That power won't be knocking Tony out, but I see that fight as the end of the line for Shane, and I think Tony will give him a one sided beating. The movement in the legs simply wasn't there against Mayorga, and its a tool he'll really need against a pressure puncher like Margarito.