Mike Tyson would K.O. Deontay Wilder
Although Wilder is unbeaten and has a string of KO wins he is still inexperienced and untested, even Audley Harrison is a step up in class for him...
In 1996 Tyson was not at his best but was still world class, beating the likes of Frank Bruno and Bruce Seldon in title fights. Therefore I think he would KO the 2013 Wilder within five rounds.
Any version of Mike Tyson KO Wilder. I have said it before that Wilder is a KO waiting to happen.