Wait, so is classic Sonic and modern Sonic from a different timeline now?

Sonic the Hedgehog, The Codex Wiki

Sonic Mania (Video Game) - TV Tropes

Sonic the Hedgehog - A Line Through Time by The4thSnake on DeviantArt

A Sonic Cartoon PRIME-r

TMNT: Shredder's Revenge blends classic arcade action with modern fun - Polygon

Sonic News Nintendo Life

Is Classic Sonic and Modern Sonic REALLY the same world? : r/SonicTheHedgehog

Sophie's Pleasure-Seeking Sonic Deluge - The New York Times

Game Corner: Mighty and Ray: The Original Triple Threat – Dr. K's Waiting Room

Version 2 of my Sonic timeline, based on your feedback! : r/SonicTheHedgehog

I made a timeline with almost every Sonic game. : r/SonicTheHedgehog

Which games are included in Sonic Origins? Release date, platforms, and more