Rock Band 4 Update Coming Today; New 'Smart' Difficulty Mode
As part of the Rock Band 4 December update, players will receive the new Brutal mode at no extra cost. You'd better be ready for a challenge because this is going to "put even the most hardcore players' skills to the test."
Brutal mode is a clever little addition which monitors how well you're doing and adjusts as you might expect. You're going to need all of the talent of a true rockstar when the notes start to disappear in front of your very eyes; the game won't accept anything less than perfection as you can see in the video below.
Furthermore, the December update will offer a score challenge feature, full-combo recognition, player stats, and a handful of little bug fixes that have been plaguing the game for a while.