Update: It’s a smartphone game:
SEGA has stated on the official Tokyo Game Show 2021 site that they are planning to unveil a new RPG project at the event. Rumours have naturally been swirling online regarding what SEGA could be planning. It seems likely that it could be a revised version of Sakura Wars which launched in 2019 for the PlayStation 4 console or it could be a new Valkyria Chronicles game. All will be unveiled on the 1st October at 10pm JST.