#1 Ric Flair's involvement

The odds are on the 'Nature Boy' to get involved somewhere in this gigantic clash. Flair holds a special place in the history between Triple H and Batista as the 16-time world champion mentored both the legends and was part of the iconic faction Evolution.
Ric Flair, Triple H, Randy Orton, and Batista- The Evolution is one of the most impressive and dominant stables to have ever stepped foot in a WWE ring.
Batista spoiled Ric Flair's 70th birthday bash and The Nature Boy must get it back at 'the animal' in one way or the other.
While being a special guest referee might be distant thought considering Ric's recent health scare, an appearance from the crowd or being at Triple H's corner will make a lot of sense.
Ric Flair's presence will be a delight for the WWE Universe and will definitely take this rivalry to an all different level.