The studio behind Sonic Mania helped out with Sonic Origins

Sonic Origins was finally announced yesterday, alongside a confusing amount of DLC, and Sonic Mania team, Headcannon, helped in development.
The Sonic Maniacs are back.

Sonic Mania Plus Feature Spotlights New Characters

Sonic Origins - Wikipedia

The Evolution of Sonic the Hedgehog

Why did Sega let Christian Whitehead, Head Cannon, and Pagoda West Games to make Sonic Mania? Sega's Sonic Team are great in making Sonic Advance 2D platform games, why not just use

GameInformer: Why Didn't Sonic Mania 2 Happen? : r/Games

7 Games Like Sonic The Hedgehog Worth Playing

No, Sonic Mania 2 Wasn't Cancelled Because of Bad Blood Between SEGA and Evening Star - Games - Sonic Stadium

Interview: How Sonic Superstars was born from a Zoom drinking party

Tyson Hesse And Jasmin Hernandez On Making 'Sonic Mania Adventures' And The Latest Holiday Special

Sonic Mania is a nostalgic reminder of the series' core issues

Sonic Mania Plus, Sonic Wiki Zone

Tyson Hesse And Jasmin Hernandez On Making 'Sonic Mania Adventures' And The Latest Holiday Special