J. Cole is someone to watch for in 2009 and beyond as he is under the Roc Nation umbrella that Jay-Z is currently building.. Here he rips apart the “Dead Presidents” instrumental and this wasn’t the first time he’s done it since he did it on his very first mixtape, The Come Up.. Now hes gearing the release of his second mixtape, The Warm Up, which should be out in about 2 weeks..