sentences:  Nitro made his debut for the brand on the June 19 episode of "ECW", with a win over Nunzio, and few days later, on June 24, at , he won the vacant ECW World Championship by defeating CM Punk, replacing the absent Chris Benoit due to his double-murder suicide.A few weeks after winning the title, Nitro was repackaged as John Morrison, a reference to musician Jim Morrison, to whom Hennigan bears a strong physical resemblance.In the months to come, Morrison would retain the championship against Punk at The Great American Bash in July, and SummerSlam in August.