The Sonic Mania studio helped work on Sonic Origins – Destructoid

There is now a Sonic Mania studio Sonic Origins connection - Headcannon has confirmed their involvement with Origins.

Sonic Mania: The Sonic Redemption - The Completionist Review - : r/TheCompletionist

Sonic Mania: The Sonic Redemption - The Completionist Review - : r/TheCompletionist

The Sonic Mania studio helped work on Sonic Origins – Destructoid

Sonic Origins Mania Project Sonic and Sega Retro Forums

The studio behind Sonic Mania helped out with Sonic Origins

Review: Sonic Superstars – Destructoid

The end of decade by TrueSonicSpirit on DeviantArt

Origins Mania Project [Sonic Origins] [Works In Progress]

Sonic Origins Redraw! by TayStudio on DeviantArt