The next Transformers character in the Revoltech line has been revealed to be Jetwing Optimus, called "Optimus Prime DX".
It is number 040 in the Revoltech series (which does articulated figures from a variety of JP anime series), and is scheduled to be out October 1st in Japan.
It's probably just a minor reworking of the earlier Optimus Revoltech figure, with lots of extra bits. (I don't collect Revoltech, so not sure)