That is terrible news, and not for the reason you'd think... It's just that... To date, Japan has never made anything good using the Transfomers franchise...
Transformers: The Mystery of Optimus Prime happened, Transformers Armada happened, and to a lesser extent, Michael Bay's Transformers happened...
That which must never be named, did NOT happen. Or at least, the series never happened... Cruelly enough, the Transformers Fan community has to admit to its existance, because the Optimus Prime model made to promote... That which must never be named... Was actually the most high quality Optimus Prime model out there for a very long time.
And considering Gainax's love of all things round and floppy, I think you will understand that I am going to be skeptical about this.