5. Sting
Can Sting still go? The WCW icon suffered from over-exposure (as well as the old unstoppable foe - time) during his later years with TNA, his in-ring quality unquestionably dipping as a result. Now rested, refreshed, and raring to go, an impressive debut could well be on the cards. Conversely, he could prove to be a walking disaster. The pressure on Sting's shoulders will unquestionably huge, particularly due to his status as perhaps the biggest star never to compete in a WWE ring. Fans have a right to be concerned. Although a master of performance and charisma, Sting's workrate was never considered among the stratospheric levels of contemporaries such as Ric Flair. Were his match on Sunday against Shawn Michaels or a younger star renowned for putting over their opponents - Ziggler? - nobody would be too worried. The fact he's facing Triple H is not ideal; the Game is clearly still capable of having a fantastic match, but can't carry a lacklustre opponent to a classic in the way true greats can.