In correlation with WCW, ECW was also missing most of their key wrestlers such as The Sandman, Sabu, Balls Mahoney, Little Guido, and Tony Mamaluke (all of whom would later join WWE's relaunched ECW). Other ECW wrestlers such as Shane Douglas, Masato Tanaka, Terry Funk, New Jack, Steve Corino, and Mikey Whipwreck also did not participate in the storyline and would never go on to wrestle for the WWF/WWE on a full-time basis. During The Invasion storyline, the usage of the "ECW" name on-air was subjected to dispute as ECW's assets were still being debated in bankruptcy court. The WWF's use of ECW's theme song "This Is Extreme!" during The Invasion storyline led to legal action by Harry Slash & The Slashtones, the singers of the song. In January 2005, WWE purchased The Slashtones' catalog, two years after they had purchased ECW's assets in bankruptcy court.
