There's some blue sky wishes.
Regarding the novel's sequel, it's supposedly going to be a different type of storyline - no contest, but still exploring the pop culture references. Not all books lend themselves to movies, so whatever comes next could be so out of left field that there would be no way.
If Spielburg isn't involved, there's probably also no way to get all the pop culture references again. Spielburg is a powerhouse that people love to say "yes" to.