As reported by Arsenic on Twitter, the Sonic Origins files include references to content that will be found in the upcoming Sonic Frontiers, but has yet to be officially unveiled, such as Cyberspace levels, which are rumored to be the “Boost” style stages similar to those seen in Sonic Unleashed, Sonic Colors and Sonic Generations, and the return of Big the Cat and fishing. Apparently, these files are found in Sonic Origins because the collection’s menus are built using the same engine, the Hedgehog 2 Engine, that is being used for Sonic Frontiers.

— Arsenic (@ahremic) June 22, 2022 Sonic Origins is the latest collection released for the Sonic the Hedgehog series, including the first three main entries in the series, Sonic & Knuckles and Sonic CD, complete with additional features like Classic and Anniversary modes, new Missions, and more. Sonic Origins is now available on PC, PlayStation 5, PlayStation 4, Xbox Series X, Xbox Series S, Xbox One, and Nintendo Switch worldwide. Classic Re-defined Explore the classic Sonic titles in high resolution, with all-new opening and ending animations for each title! New Unlockables Complete various missions to collect coins to unlock new content, challenges, and Special Stages through the Museum. Classic and Anniversary Mode Choose to Spin Dash your way through the numerous zones in Classic mode with the game’s original resolution and limited lives, or the new Anniversary mode with unlimited lives and revamped fullscreen resolution.

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