Putting spoilers just to be safe. I'm not sure how much screentime the Twins will have as the Truck before reformatting, but it might be enough to warrant possibly a voyager class that splits into the two twins. Then again, Hasbro may want to save their resources. If they did make a toy of this though, I would expect it to be like the Han Solo-Chewbacca Millenium Falcon toy they made for the crossover line a while back.
I KNOW we will. I work at a store and have one of hasbro's deco people as a customer, and was quizzing them a while back and got them to spill the beans just a tad about it.
The last movie line made huge bucks, and Hasbro knows that. They'll make a toy for every character, whether they're in the background, get battle damaged in some scene, have a temporary alt mode, etc. We'll probably even see more figures based on vehicles in the movie ala the "Allspark Power" sub-line. If it'll sell, it'll be made. And I would love an Ice Cream truck figure...