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 update adds extra stage transitions, a new boss and other new features

The Evolution of Sonic the Hedgehog

Sega Dev Reveals Why Sonic Mania 2 Didn't Happen

Buy Sonic Origins: Plus Expansion Pack

Sonic Origins 1.04 (Switch's 1.4.0) update released, addresses almost 50 bugs.

Sonic Origins Mania

The studio behind Sonic Mania helped out with Sonic Origins

Sega hiring Sonic lore manager to ensure universe more meaningfully connected

What Happened to Sonic Mania 2? Takashi Iizuka and Christian Whitehead Explain – Sonic City

Sonic Mania 2 CANCELLED?!, Mania Team Working On NEW 3D Platformer!!!