I agree that most people believe that John Cena will retain the championship, just because he just won it at the last pay-per-view, but look at the last 2 champions. Batista defeated Chris Jericho at ''Cyber Sunday'' to win his 4th World Heavyweight Championship in a match that most people thought that Jericho would retain. Eight days later, on the 800th Episode of Raw Celebration, Batista was forced to defend his World Heavyweight Championship against Jericho inside a ''Steel Cage''. This was a good match overall, but at the end we all saw Chris Jericho shock the world and regain the World Heavyweight Championship.
Prior to that matchup, Shane McMahon had already announced that the winner of the Batista/Jericho match would go on to defend the championship, at ''Survivor Series'' against the returning, John Cena. Twenty days after winning the title, Jericho did defend the title against Cena which resulted in a defeat. Two incredible champions, Batista and Jericho both lost the gold way too early, so the question is, will Cena add to that list of title reigns cut short?
If you take a look at the list of people who have won the World Heavyweight Championship in the year 2008, you'll realize that none of them have had a very long or even remotely long reign. From Edge to Undertaker to ''vacant'' to Edge to Punk to Jericho to Batista to Jericho, none of those reigns were too long except for Edge's first one which began in late 2007.
If history plays a part in this, then Cena could very well lose the title back to Jericho. Despite all that, I expect Cena to retain the World Heavyweight Championship and hold it until atleast Wrestlemania 25.