Sonic Mania Plus

Sonic Mania Plus is an upgraded re-release of Sonic Mania. It has been announced to be released in mid-2018. In addition to receiving a physical release with bonus materials, this definitive version will also be released as an update to digital copies of the original game.

New features

 * Mighty the Armadillo and Ray the Flying Squirrel will be featured as playable characters.
 * The Competition Mode will be expanded to allow up to four players.
 * An "Encore Mode" will be added to the game, which will remix the Zones with visual changes.

Promotion
With the announcement of Sonic Mania Plus, a wave of promotional material was announced. Those buying the physical version of Sonic Mania Plus will receive a holographic slip cover, a reversible SEGA Genesis or Sega Mega Drive-themed sleeve (for the United States and Europe respectively), and a 32-page art book.

Trivia

 * This is the first game that Mighty returns as a playable character since Knuckles' Chaotix in 1995, while Ray has not been playable in any game since his debut in SegaSonic the Hedgehog in 1993.
 * In addition, this is the first 2D sidescroller Sonic game that Ray appears in.
 * In North America, the reversible sleeve is going to be Sega Genesis-themed, while in Europe, the sleeve is going to be Sega Mega Drive-themed.