By the end of August, concretely on August 28, Sega Games trademarked Re:volvers8.
And besides, as you can see, a logo for this trademarked appeared within the filing.

You know: Tokyo Games Show 2018 is currently being held, so stay tuned.

Revolvers8 TM 09 11 18 Re:volvers8, the new game trademarked by SEGA in Japan | VGLeaks 2.0

Via | Gematsu