Introducing Project Rap Rabbit

Project Rap Rabbit (working title)

The creators of PaRappa The Rapper and Gitaroo Man combine forces to mastermind an all-new, story-led, rhythm-action adventure.

According to their Kickstarter page.

An explosive mix of Japanese folklore and traditional artwork, hip hop and humorous battle rap face-offs inspired by the Epic Rap Battles Of History YouTube series, Project Rap Rabbit (working title) is the next major game from the creators of PaRappa The Rapper, Vib-Ribbon, Osu! Tatakae! Ouendan, Elite Beat Agents and Gitaroo Man.
Check out the details here