Rock Band 4 (PS4/XBO) Coming Out This Year. Supports Old Instruments and 2168 Songs!(Update) Added a Q&A portion from the team.

[CladInShadows]

The only possible concern I have with this is the fact that I have Guitar Hero guitars. I never did like the Rock Band guitars. I hope those are compatible too. Also, I'm pretty sure my Ion Drum Rocker should be good to go.