The 5/13 Ring of Honor & New Japan “War of the Worlds” Supershow at the former ECW Arena in Philadelphia, Pennsylvania is listed as “sold out” on the website for the arena, now known as the 2300 Arena, where you can purchase tickets. That would mean the show is sold out without a single match, nor wrestler from either ROH or New Japan, announced for the show prior to the sell-out.
Source: 2300Arena.com