Yeah I'm sure they're just figuring out who's going to write which film and getting their ducks in a row. With regards to Kasdan, he's certainly not the superhuman writing genius some fans would like to think... but that's because no one is. Absolutely every writer in history has written some duds. But not everyone writes something great. Any writer is a gamble, but at least we know Kasdan has the potential to reach those heights.