Recently, Amazon listed a Sonic Mania + Team Sonic Racing Double Pack for release this fall. It seems like SEGA has more plans though as Gamefly has listed double pack as well! This Double Pack includes Sonic Forces and Super Monkey Ball: Banana Blitz HD for Switch. This double pack releases on October 31st. More details will likely arrive closer to this fall.
In the meantime, stay tuned at Final Weapon for the latest Japanese gaming news!