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.

The studio behind Sonic Mania helped out with Sonic Origins

Gaming J3Blackgamer

Review: Sonic Forces – Destructoid

Figured it'd be appropriate enough to share progress on/showcase Junio/Toei Sonic (and more) since Sonic CD released today (Nov. 23rd) for America's Sonic Mania Day in 1993. : r/SonicTheHedgehog

Sonic Origins, Sonic Wiki Zone

Dev Game Club

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

Sonic Mania - Part 5 - Studiopolis Zone Act 1

Retro gamer №119 by Michel França - Issuu

Sonic Origins got help from the Sonic Mania team

Sonic Origins, Sonic Wiki Zone