Rock the Kasbah?

I apologize, but I searched high and low, but found zero details about this upcoming film's plot. But that's okay. The cast is top-notch. Bruce Willis, Kate Hudson, Danny McBride, Bill Murray, Zooey Deschanel, and Scott Caan are all starring in this movie. Isn't that just a great cast? I think so! Anyway, it's a comedy film from Barry Levinson and Mitch Glazer with a release date of April 24, 2015. Hope to learn more about the plot in some way or another.

UPDATE: I've learned it's about a washed up music producer. (Honestly, that's what I assumed from the title, but still.)