The protesters have arrived in full force at City Hall, and so has Mayor Bloomberg and Matthew Broderick: it’s time to settle in for the City Council hearing on N.Y.U. 2031 – the final one before council members vote on the fate of the school’s expansion plan in Greenwich Village. Follow us on Twitter or stay parked right here as we update in real-time from what is sure to be a marathon meeting. If there’s a lull in the action and you want to brush up on what all this hoopla is about, you can review our Expansion Explainers. Otherwise, without further ado…