Looking back at past WMs, they seem to have an tendency to book any and all celebrities past their shelf-life. The only reason Mike Tyson was a good idea was because no one had seen him in years due to his prison time. Lawrence Taylor, Mr. T, and Cyndi Lauper are the only celebirites I can think of who got involved (as opposed to just being in the crowd) in a WM that were actually still relevant from a pop culture standpoint.