superchunk on 21 July 2010
Ya know there was also a big difference in the marketing of those moves. Avatar and How to Train your dragon was advertises primarily as a 3D movie, while all the others had normal advertising that merely said also in 3D usually at the end.
Therefore people just didn't care as much. Hell, I didn't even originally think The Last Airbender was even avail in 3D, it was clearly an after-thought based on Avatar's success.
