Nintendo officially announced Mario and Luigi Superstar Saga + Bowser’s Minions during their Nintendo Treehouse presentation during E3 2017.
The game is a remade version of the Game Boy Advance game from 2003, which was praised for its funny story, fun platforming challenges, and twist on the RPG formula by having the player control the two brothers simultaneously and having them jump and attack with their own dedicated buttons. The game has two sequels on the Nintendo DS (Mario and Luigi: Partners in Time and Mario and Luigi: Bowser’s Inside Story) and two sequels on the 3DS (Mario and Luigi: Dream Team and Mario and Luigi: Paper Jam).
The remake also includes Bowser’s Minions, a spin off starring the enemies of Mario and Friends. The story picks off after the Koopa Cruiser crashes in Superstar Saga. It has a completely different battle system to Superstar Saga, where you deploy teams of Goombas, Koopas, and more to attack enemy teams. You spend “captain points” to command your units and prevent the enemy from using special skills, increase the stats of your team, and more. Each unit has different special skills, strengths, and weaknesses such as Shy Guys being strong against Lakitus and units having melee or ranges attacks. Units can also be leveled up. Levels are a series of battles against teams of baddies with captain points slowly recharging after each battle, meaning you’ll have to spend the wisely. Cutscenes can be fast forwarded or turned off completely once you’ve seen them once.
New Amiibo figures of a Goomba and Koopa are also coming, and they along with the Boo Amiibo will unlock additional functionality for the game. Features have yet to be announced, however.
Rumors of the game actually existed since last April when Twitter user @SciresM found evidence of the game on the Nintendo eShop. He examined the new update on the eShop’s title ID database and found reference to the remake (then coined as Mario and Luigi Superstar Saga DX) as well as Bowser’s Minions.
Michael also found menu screen icons for the game as well as the one for Ever Oasis. The icon is just one of the hundreds he found.
In May, Kotaku’s Jason Schreier confirmed that the Ever Oasis home screen icon, and by extension the one for Mario and Luigi Superstar Saga, are real. Schreier was at an event in New York City where Nintendo was showcasing a demo for Ever Oasis. He looked at the home screen of the 3DS he was playing on and found that the icon for Ever Oasis matched the one Michael found. So that would suggest that the icon for Mario and Luigi Superstar Saga would be real too.