If Anderson lost he would probably retire. It isn't like there is a line of PPV buyers for Silva/Weidman, so I don't see the difference. GSP woulld win by 5 round decision. People wouldn't think much less of Silva if he lost that way. The same people would still tune in to watch him wreck fools at 185.
My prediction of PPV buys is 1.5 Mill. That fight would get so much hype behind it.