Vince McMahon is a 70-year-old grandfather. Though hes a former world champion and Royal Rumble winner, his days of competing against his talent are long behind him (thankfully). But that still doesnt preclude Mr. McMahon from becoming physically involved in the WWE World Heavyweight Championship match Monday night. McMahon is serving as the guest referee in the Sheamus/Roman Reigns title match, and while its obvious he will be biased in favor of Sheamus, it remains to be seen if Vince will be dragged into physically assaulting the champ. McMahon already has kicked Roman low to set off this feud several weeks ago, and Reigns returned the favor with a Superman punch en route to winning the title.With the League of Nations likely getting involved in this match, could we see Vince piling on, or will he just be the underhanded ref who uses a loose interpretation of the rules to try to get his way?