Randy Orton is out due to a back injury, but is scheduled to return to action the week before the Royal Rumble.
The WWE should hold The Viper until the Royal Rumble and have him return during the match.
Daniel Bryan is the Heavyweight Champion (Smackdown) and he'll face Mark Henry at the Rumble for the title that no one cares about. (Unless Randy Orton or The Undertater is holding it.)
Mick Foley made a wrestling appearance on Monday Night RAW, and his involvement in the Rumble wouldn't be a shock.
Triple H is always active, and The Undertaker hasn't been seen since Wrestlemania. Will they enter the squared circle and toss a few jobbers over the top rope?
The Rock wrestled at Survivor Series, and Stone Cold has recently said that he'd be willing to do a few more matches. Perhaps we'll hear The Great One and shattering glass on January 29th.
Finally, Batista and Brock Lesner have both been rumored to be making returns to the WWE.
The Royal Rumble always proves to be one of the most entertaining and exciting pay-per-views of the year, and 2012 will be no different.