I could see them overturning it. If you watch closely, it looks like his left foot skims the OOB line. You can see the rubber kick up. Hopefully the ref doesn't see that, though...
For those not watching. WR beats LJ for a should be TD, but LJ dives and swipes the WR feet, almost knocking him out of bounds, losing balance juggles the ball, gets it back, falls down and fumbles again. James Smith falls on the ball in the endzone.