By SI Staff Plus, which No. 1 seed could be next to go out? The men’s NCAA tournament will be back in action on Thursday night with the Sweet 16, but before that, we’re breaking down the remaining bracket. We asked five writers to give their takes on surprises so far, the No. 1 seed that could be in trouble next, which double-digit seed could get to New Orleans and more. Besides Saint Peter’s in the Sweet 16, what surprised you most about the opening weekend?Pat Forde: Iowa State is a shocker to me. The Cyclones were brutal offensively in their final three games leading into March Madness: sco…