It doesn't really matter what happened at oral arguments. They are largely meaningless theater. What matters is the arguments in the briefs, and the logic the panel can find in there to arrive at the conclusion that they want to arrive at. Namely: guns are bad, and no way are we going to be the ones to open the door for all you crazies to be legally carrying in public.
I predict a loss, which is good because we then have a straight shot at SCOTUS instead of getting all caught up in an en banc review.