Jones said in a tweet that it seems increasingly likely that a sequel will happen.
Also, keep in mind that the box office success of the movie isn't the only metric for success. It's also meant to reinvigorate the IP. If it does that on any level it was a success. See a movie once? That's like 12-20 bucks depending on where you live. Resub to the game for a month or two? Also good. Buy the expansion? Better.