Who Will Rick Rubin Produce Next?

It's probably the most enjoyable game in music. What talented but in-a-rut artist will producer Rick Rubin rejuvenate next? He's done wonders with launching the Beastie Boys, overseeing numerous metal acts and then becoming a legend for helping Johnny Cash pour out a ton of music in the last decade of his life. Now he's done the same for Neil Diamond. Billboard has the word: Metallica, bringing Rubin back to his metal days. Plus a dash of Justin Timberlake, followed by...Linkin Park? And my hope remains that he'll work with Bill Withers.