This unfortunately seems to be the common fate of licensed games based on popular shows and films - sooner or later the license costs more than it's worth, or the licensing company makes life so difficult that it isn't worth continuing.
The only exception I know of is Games Workshop, where Bryan Ansell is said to have given up the 2000 AD licenses, not because they were costing a lot but because he calculated that there was more money to be made by concentrating on figure-heavy games such as Warhammer. He was right, but I can't help wishing that we'd seen more for Dredd, Strontium Dog, etc.
