I am sure there are plenty that think or want the land to be a flop, but an attraction's success has little to nothing to do with a movie's success. The quality of the land and the attractions alone will determine if it is a boom or bust.
Splash Mountain is one of the most popular attractions in WDW and I would wager that more than half of the people that ride and love it have no idea that it is based off of a movie.
time will tell....so is the YETI completely gone? Is Dinosaur closed thru August?