During the Sonic the Hedgehog 25th Anniversary Party, SEGA announced the next Sonic title, which for the time being, it's only known as Project Sonic.
Project Sonic is being developed by Sonic Team, the team behind titles like Sonic Generations and Sonic Colors. Not much is known about the game at the moment, but the teaser trailer reveals that "past" Sonic from Sonic Generations will be back in this game. SEGA promised to reveal more details in a near future.
Project Sonic releases holiday 2017 on PS4, Xbox One, PC and Nintendo NX.