The Energon Pub

https://takaratomymall.jp/shop/g/g4904810139768/

https://hobby.dengeki.com/news/972444/

Comics are at the bottom of the TakaraTomy Mall link.

The comic suggests he can go Ultra. That's neat.

I wonder if he's still a Headmaster.

On the subject of the comic, I hope it gets translated soon; this is one of those that's hard to follow without the text.
Also, people are gonna be jonesing for God Neptune all the harder now: Halfshell appears in the comic.