Full list of everything the Sonic Origins DLC will contain, from SEGA Asia's website : r/SonicTheHedgehog

Sonic The Hedgehog 2 HD Project (Fan Game) - Is it any good?

Superstars DLC and New game in 2024 - Sonic News - Sonic Stadium

Sonic Origins - IGN

Xbox One, Sonic Wiki Zone

I listed the stuff Headcannon seemed to want to add to Sonic

Sonic Superstars

Franchise Festival #87: Sonic the Hedgehog (2008-2017) – The Avocado

SONIC ORIGINS Official Site

Sonic Origins deserves a Physical Release, so I just made one