Nobody knows, except Square Enix.
The house of Actraiser recently trademarked Sliding Heroes in Europe and North America.
Why did I mention Actraiser instead of Final Fantasy or Dragon Quest? For me, Sliding Heroes sounds like a touch screen platformer for the Nintendo DS and Actraiser even though it was one half god sim, it was one of the few platformers in Square Enix’s history. Whatever this is it’s probably nothing like Slide Mag Kid, a Nintendo published DS game that had players slide their DS around with an infrared controller.