Unfortunately, it is not so simple. The judge practically can do whatever s/he wants in these cases. In most of these cases there is no factual dispute, it is a mere interpretation of the law. Because there is no higher level court decision precedent and the previous court decisions are divided (although, fortunately, more favorable decisions for the Plaintiffs) the outcome is unpredictable. The judge can rule solely based on the documents filed with the court, without an oral hearing. I saw cases when the judge didn't even wait for defendants' answer or motion, see 786riz's case.
Still, the most likely course of action, in my opinion, would be that the judge orders some sort of initial case management conference. At one point, AUSA will file a Motion to Dismiss, if your case is not solved by then. After that you will file an Opposition the Defendants Motion, they may file a Reply to your opposition. After that the judge euither will rule on the defendants motion without a hearing or will order a hearing. There can be a Motion for Summary Judgement, in that case you will need to file an opposition and probably a cross motion for summary judgement. The course of action can vary from district to district and judge to judge, inside the same district. The judges have a fairly large autonomy, of course they need to follow the FRCP, but this gives them enough flexibility that practically it is unpredictable how exactly your case will evolve.