Meek Mill to Collaboration...w/ Jay Z. Meek Mill Hints At Collaboration...w/ Jay Z It looks like it is going to be a hot Summer. Meek Mill has been teasing Dreamchasers 4.5 for the past couple months. It looks like he might be ready to release it soon. He's hinting at a collaboration with... Jay Z? The Philadelphia rapper did so Instagram where he showed his Dreamchasers chain next to the iconic Roc-a-fella chain. So is a collaboration in the works? I guess we'll find out very soon.