Why is the theme bad? Why was it a disaster? How can you even gauge your response? Did you see sales figures? I for one think the sets are fantastic and have bought each and every one. If you don't like it I get that....you're welcome to your opinion like I am. But I would keep it at your opinion.
If anything? What basis do we have for this besides guesswork? Just because it wasn't top 5 doesn't mean it's dead. They've developed a game, tv show, and from what I heard the Fortrex was one of the top 5 selling sets at Toys R Us last year. Just food for thought.