https://www.gamespot.com/articles/ahead-of-super-mario-odyssey-nintendo-announces-bi/1100-6453569/

A big update is on the way for Nintendo's first marquee mobile game, Super Mario Run. On Friday, September 29, Nintendo will add new content to the auto-runner, including more levels, an additional mode, and another playable character.

The most notable addition in the upcoming update is World Star, a new game world that consists of nine levels. Eurogamer reports that these stages will feature new enemies and gameplay mechanics, and the world will only be unlocked after players complete the game's existing six worlds.