Common sense would point to the Remain vote winning, however as we've seen the Leave camp are incredibly vocal and supportive and will turn out in their droves to back Leave in the polls.
I don't know who will be the one to rally the people into voting Remain. The Tory's won't be doing that, and Corbyn isn't campaigning for Remain either. Not sure which of the more prominent figures will stand up, and more importantly get the required press coverage needed. All of Boris, JRM, Gove, etc., will be all over the TV and front pages - unless Labour changes their stance and throw their full weight behind the Remain camp I wouldn't be certain that Remain wins, or at least not by the margin it should do (in my opinion). People will again be complacent and think 'everyone else will vote Remain so why should I bother?', same as the initial vote, which we cannot afford. It must be drummed into everyone that every single vote matters, and it needs more than a few cross party MPs the public may not recognize to be the ones campaigning, and pointing out the lies and BS spread by the Leave camp.