SEGA hosted a live steam twitch session earlier this evening for the primary reason of revealing their new sonic game which is to be released in 2017. The name of it is Sonic Mania and it harkens back to the Sega Genesis/Mega Drive era. No, you didn't walk into a time machine, no, you didn't end up in a parallel universe, and no this isn't a dream, this is the real deal!

Edit: It is coming out for Xbox One, PS4, and PC

Sonic Mania reveal trailer