As noted above, you can see hints of these sets here
which LEGO is slowly unveiling. If you're too impatient to wait, it turns out you can edit the url for the images and get the revealed images. Brickset has them all here
. Interestingly, it looks like there will be two version of several of the sets. For instance, if you look at 70804 under the cover, it looks like a pretty straightforward ice cream truck.
OTOH, the 'revealed' image appears to be a different model. It looks like in the movie several things that start out as fairly normal vehicles or buildings will be rebuilt to make mechas or spaceships.
I'm guessing a lot of these sets will have two sets of instructions. Which then leads to set 70806, Castle Cavalry:
The name seems odd, because there aren't any horses, but what do you think the other model will be here. From the parts I'm guessing it will be a tower and a small cart.