Rock Band 4 just got announced recently! http://www.harmonixmusic.com/blog/rock-band-4-announced/
After years are waiting, we'll get to rock to success all over again! The game is currently coming to XBONE and PS4 this year, and those who previously spent DLC on the past games can redownload those songs for Rock Band 4 (For example, if you had DLC music on PS3, you can transfer it to PS4). Mad Catz has confirmed to sign on as they will be creating the plastic guitars and such! It's already been confirmed that no new features will come to the instruments.
Are you going to Rock with your Band? Discuss it all here!