Silva has no business in the MW division anymore let alone at LHW. Cormier is also the worst possible style match up for him.
There really isn't any chance of a Bisping/Rockhold upset KO because DC's chin is too good. If he can take flush bombs from Rumble then he can take anything from Silva.
Its a non title fight. Im sure the UFC doesnt want to risk Cormier losing the title for when Jones and Cormier finally do fight. Would be really interesting if Silva pulled a Diaz and got the upset. That would really shake things up.