The Skywarp redeco of MP Starscream was noted by TakaraTomy when they revealed Thundercracker (about an offer to get some bonus items for Starscream if you bought all three).
It is now up on the TakaraTomyMall website for release in December for 27,500yen, and is likely to be on our EB Games site soon as well.
A number of official images can be seen here.
The bonus accessories for Starscream, for those in Japan who buy all three, and fill out surveys.
It will have the MP number of MP-52+SW... which is messy, but I think people gave up on trying to understand their numbering system a long time ago.