Sonic Origins got help from the Sonic Mania team

The Sonic Origins developer is actually the Sonic Mania team at Headcannon, at least partly - even as fans continue to complain about the strange pre-order DLC

SEGA's Sonic Mania and More Come to Origin Access Premier

The Ultimate Sonic Bundle for Nintendo Switch - Nintendo Official Site

Sonic Origins overview trailer - Gematsu

Sonic Mania is the sequel we've waited 23 years for

10x Sonic Mania Plus Origins, But Its Only The Cha by Abbysek on DeviantArt

Sonic Mania 2 was never in the works because Sega and its devs wanted to move away from pixel art and “make something fresh”

Sonic Mania Plus Review - An Updated Insta-Classic - Niche Gamer

Sonic Mania: How it Became the Ultimate Sonic Experience

Sonic Mania Dev on Origins of Easter Eggs, Sega References

Sonic Origins Plus, Sonic Wiki Zone

The studio behind Sonic Mania helped out with Sonic Origins

Sonic Origins Fixes For A Variety Of Issues In The Works

Classic Sonic Hack 'Sonic Megamix' Is Being Remade In Sonic Mania's Engine