I hope they don't throw in some sappy love interest in this. I always get board to tears. They could spruce things up a bit by not having any romance subplot.
And I'm going out on a limb here, but I'm rooting for Chris Pine as Groot. You may hate the idea now, but when they cast him you'll all be coming out of the woodwork. Remember, I planted that seed in your heads first.
As for who should play Rocket Raccoon? I'm stumped.