Roc Nation’s J. Cole and Top Dawg Entertainment’s Kendrick Lamar are set to join forces on a new mixtape. The as-yet-untitled collabo is already underway. “We don’t have a title or release date yet but J. Cole got like 90 percent of the production so far,” Lamar told XXL. “One of my favorite songs of the project is a song called “Shock The World,” Cole layed the first verse and set the tone for the whole record. It’s going to shake up a lot of people.” Cole spoke to MTV’s Sway on “RapFix Live” last week, saying: “Me and Kendrick doing a whole ridiculous thing together that’s gonna tear up the world.” This sounds like it’s going to be some crazy sh*t! Ya’ll ready?!