I know I’m being contrarian, but it is a risk to let it stagnants. The worst you can do is to turn it into pre-Marvel Sony/Spiderman. That is a textbook example of of not taking a creative risk and turning your cash cow into cash minnow.
If the sunny Episode 4 is not followed up by the darker Episode 5, who knows what could have happened? Would SW be as big as it is now? Lucas et. al., for all their faults, took creative risks. Especially with Episode 1. And I applaude him for it. I’m NOT a hater of Episode 1 (especially since I have never watched Episode 4-6 in cinema, but only on tele.)