A teaser site (via Andriasang) shows a blue gloved hand typing in a code. The site reportedly states that we won't be able to guess the identity of the game, so you can probably discount whatever first comes to mind.
It's worth noting that Banpresto has been a wholly-owned subsidiary of Bandai Namco since 2008. The company's game development efforts were folded into the parent company, while the brand remains in use for manufacturing toys and prize machines in arcades. Mentioning the Banpresto name could mean the 3DS game has some kind of arcade or toy tie-in, or it could have been invoked to remind Japanese gamers of some of the company's beloved properties, like Super Robot Wars and Magna Carta.
The combination of talent sounds intriguing, but most rock super-groups fall apart and produce albums that are only a shadow of their members' best work. Let's hope the same doesn't hold true in video games.