He's till in it. It said in Vince's letter that Ryback will be going for the belt again in the "very near future".
Very near as in after the Royal Rumble Ppv...
Watch your favorite super heroes...... and Super Cena on Saturday Mornings!!! Only on the CW Network!
Websters Dictionary definition Super Cena (n):
1. To mislead the audience that the character is an underdog. John Cena got DDT'd on the concrete, hit in the back with a chair, then put thru the Spanish announce table. However, all is that is for naught because he switched into Super Cena and no sold all of that, to win the match. (credit: Scott Trahan)
2. Humiliated more than three forths of the match only to come back and win with five moves of doom. Super Cena emerged from the ashes and won the fight after being brutally beaten down to a bloody pulp
3. Alter ego of a Superhero. Unstoppable. Exception: See The Rock.
Punks knees have been bad for ages so it wasn't Ryback that did it (also the chances of someone injring their knee of all things when taking a back bump like that is extremely rare). Didn't his removal of the Pepsi Plunge from his move set come about because of his bad knees (and HHH reportedly)?