For the moment this is only my guess, but there are details that I found out that put in comparison valorize my idea that the TF5 Megatron transforms into a winged dragon with three heads that you see at the beginning of the trailer spot! Most likely the character of the reference cartoon is the RID Megatron, that among its six transformations is that of a winged dragon with two heads, with the difference that in the character of the film, the wings form parts of the armor of the robot (photo 1). Oter armor similarities highlighted in the picture 2. I doubt the film's producers propose another "Megatron trucks"... since we are in now in TF5 "chivalric mythology"... and with a Megatron reference dragon existing in the cartoon series RID, this remains the best choice for the context of the film. If Hasbro/Takara will do a good job, this Megatron will be one of the most interesting models of the new line TF5 toys... and since the last leader class Megatron was the ROTF, if there is anyone here in this forum in direct contact with Hasbro, to propose the creation of Megatron dragon leader class!