Here's something that absolutely makes sense. There is a rumor going around on a bunch of wrestling news sites that Metallica will be playing the 3rd biggest PPV of the year for WWE (after Royal Rumble and WrestleMania), WWE Summer Slam in Los Angeles on August 18th. Why do I believe this? Triple H has already come out to Metallica's song last year, they licensed "The Memory Remains" for this year's WrestleMania and overall, Metallica have a very good relationship with WWE, as Triple H has been seen at countless Metallica shows. Anytime metal and wrestling combine, I'm totally into it. Or maybe, they'll finally book The Four Horsemen vs. Metallica like I suggested to Chris Jericho that one time.