Hulk Hogan Syndrome
When a professional wrestler becomes too famous and inevitably turns into a bad parody of their former selves. This frequently happens to superstars late into their career. See also “The Big Show”, "Ric Flair” and “Jerry Lawler”.
"Shit, it looks like the Big Show has succumbed to Hulk Hogan Syndrome recently. He's pretty much just a joke now."