I heard this as well. Apparently JJ's initial cut was 3 hours and 2 minutes and there were even rumours he wanted to split the movie into two parts, which would indicate a massive amount of footage was left out from the final version. He and Disney then agreed to a 2 hour and 37 minute cut, but Disney chopped it down further to 2 hours and 22 minutes without his knowledge. I can certainly understand he would feel betrayed and blindsided by this move considering he was the freaking director! I hope we get to see the 3-hour director's cut someday as that would do the film more justice (hopefully).
Here is my source, for what it's worth:
https://www.youtube.com/watch?v=k9ybXsZ1w5c