A couple of samples of this figure were on ebay a few weeks ago, and nothing was known about it officially, so it wasn't known if it was even an official release.
Now from RobotKingdom are several images of this figure, suggesting that it will indeed be an official release some time soon.

This is the DLX Generations Megatron (stealth bomber) toy, done in purple, and featuring a small football and signature deco of the footballer Calvin Johnson.
Calvin is apparently a fairly well known Gridiron footballer in America, who has the nickname of Megatron, and last year even had some Nikes done in a purple Transformers theme.

After the recent Linkin Park Soundwave by Hasbro, this sort of thing will not be easily dismissed as a fake.
As to where it will be officially release, will be interesting, because at least Linkin Park had a store to sell theirs.