Without trying to take away from the seriousness of the topic, or even change the subject, I will say that if "Nasty" Nick ever did decide to go into wrestling, considering the personality he's shown in this situation, interviews in magazines and on Hogan Knows Best, I think he'd be almost as big a heel as his dad was in WCW.
Rock is basically retired. His appearances, while entertaining, do nothing for long-term business. Just like Austin, just like Foley, he'll be back when it's beneficial for both companies. But really, him being at WM matters not a whit to me.