Those studio guys who didn't like the movie never saw a draw for such merchandise. If we haven't seen much to this date (even with "cosplay" events), maybe they were right. There's no want for princess Leia slave girls, that's for sure. :)
THX 1138 did a good job with it's robot police ... except for that one awkward moment when one robot, searching for THX & SRT, turns to the other robot to point them out. The movement is like the actor's head is turning inside the mask while the mask stuck still. It takes me out of the movie every time.