The cast of playable characters in Super Mario Bros. Wonder could be the start of a new tradition in the series. While the gameplay does hearken back to old-school Mario platformers, Super Mario Bros. Wonder transformed the formula in a lot of ways. One of the biggest new additions of all was the game's playable cast. While it seems like a small change in comparison to everything else, it could have the most potential impact in the long term. Super Mario Bros. Wonder was an experimental game, and one that could have changed the series' status quo.