Revealing mistake: There's one scene where they are surrounded by the foot. Leonardo reaches behind him for his katanas, but he doesn't unsheath them. If you look at his elbows, you can see gaps in the pads where the actor in the suit hasn't fully fastened the gloves to the rest of the outfit.
Question: Does anybody know how soon this movie takes place after the first one? The foot soldiers are regrouping at the "fallback spot" and Shredder digs out of the garbage pile which would suggest anywhere from 2-24 hours later. Yet somehow April has a brand-new fully furnished apartment and it sounds like the turtles have been there for weeks by the manner in which the neighbor complains about the noise.