A new Rock Band 4 Trailer was released with Pricing Info available on Amazon! The “Band in a Box” pack includes the new drums, microphone, guitar and game for 249.99 and a Guitar/Game combo for 129.99.
Rock Band 4 will release on Xbox One and PS4 on October 6th 2015
https://youtu.be/Dtvh7B_U-Hw?list=PLsiJPoHlPqEHxDHEmoAi7ebcjsYadVTcV