Some early images have surfaced of the second wave of the single-packed Arms Microns (from Japan).
The four uncoloured prototypes take the concept in a new direction, with three being robot representations of Prime characters (Bulkhead, Arcee, Megatron), that then transform into a weapon.


It's like convertible Decoys (Decoys were a concept used in Gen1, that ended up being more interesting in the mini-comic they came with, than the actual figurines).