In the past, when people report that there may be many gunmen or multiple groups, it winds up being a single group of maybe 6 or 7 at most, with specific jobs like carrying out a suicide attack, or carrying along ammo for the gun-users so they can move from place to place.
I would not be surprised if this was another small-group attack of guys who moved quickly from location to location, to cause confusion and mislead the authorities.
I don't have a map of Paris to mark off the locations attacked, but if they are lined up in some way where they led to the theater, it would certainly confirm that.
Just curious if the locations were really spread out or lined up to where the terrorists could keep moving in mostly one direction and then make their last stand at the theater.
That's probably what the authorities are looking at to see if there are multiple groups involved and maybe still at large or if they got them all at the theater. (not including the suicide bombers at the stadium and wherever else.)