Okay, Im guessing this has been stated before. Anyway, on to my theory. First, the rampage we currently have has a toy isnt Rampage. It's just a bot sharing his body(drone) and was given his name for the sake of relating the toy to the movie. The rampage in the movie stayed in jackhammer mode I believe. Okay, I believe that there are multiple constructions for each limb of Devastator,maybe any protoform can become part of Devastator? We saw constructions during the battle in the desert, at least long haul, while Devastator was combined. One more thing, did they ever say his name? I dont remember it, and it's obvious why. Because of Micheal Bay naming brawl Devastator, they didnt say it as not to confuse people who were ONLY fans of the movie, not toys, previous continuities, etc.