Why? Disney infinity was actually a preety good game.

It has a mobile game go have on your mobile

Movies don't translate well into games. Now, if they did a whole new story for them in the form of a game, I'm down for it.

I dunno what would make it into a good game? I know the genre would ideally be a mix between space combat and co-op shooting, but I don't hugely know how to fit that into a game with a cohesive narrative?

Maybe do something after the film where the team are basically going around stealing stuff (probably)

But I think Disney Infinity is probably the best answer. If you want a great space based game, play Mass Effect. If you want a space based comedy and you don't feel like watching Firefly/Serenity.... Go back to the cinema?