We already let you in on that the Boondocks will be returning on April 21st with twenty new episodes. Sadly, the creator of the show (and the strip it's based on) Aaron McGruder won't be returning for the show's fourth season. The LA Times reports that Sony Pictures Television (that produces the show) has announced that the final season had no input at all from the man who created the comic strip to begin with.
It should be noted though that McGruder's next project on Adult Swim, Black Jesus is still in development. The move is still startling given McGruder has in the past been very protective with the property in the past. This reporter can only theorize that BET finally got their revenge on the creator, for revealing the true inner workings of the network in the Season Two two-parter "The Hunger Strike" and "The Uncle Ruckus Reality Show" which was only available on the Season set due to Adult Swim: