Rock Band 4
recently announced "Rivals Seasons", which allows plastic instrument aspiring musicians the opportunity to tackle community wide challenges with other Rock Band 4
players. Rock Band Rivals for Rock Band 4
gives the opportunity to earn 170 more gamerscore points.
Harmonix recently announced that they will be adding a new Rock Band 4
feature called "Missions". "Missions" will play out in every Rock Band 4
mode, difficulty, instruments, and songs. In essence, it is a task oriented, incremental difficulty, progressive system that allows significant additional and repeatable gameplay through a point based system based on the acquisition of badges. Those using "Rivals Mode" will be able to play more "Missions" with Crews.
Read more about the "Mission" system, complete with pictures and videos here
"Missions" are expected to launch via a patch in the next few weeks. Subsequent future missions will launch via server updates.