I agree, I was expecting him to return in the Rumble. What with a bunch of spots being unconfirmed at the time of the show. The one thing to remember here folks is that this is not the first time this has happened. Remember when Jericho was returning? They kept that one a secret too and Jericho refused to aknowledge that he was coming back until he finally appeared on tv. Everybody expected him to return at Cyber Sunday(I believe that was the pay per view in question). When he didn't, people actually got upset about it and Jericho's response was "I never said I was coming back at Cyber Sunday". Survivor Series came and went and no Jericho there either.
Then once everybody's expectations were deflated, he showed up out of nowhere on Raw. Frankly, I liked the fact that he returned when it wasn't expected.
I'm hoping Christian does the same. Even if he doesn't reach the top of the card, he still has a pretty rabid cult following and I'm sure he'll give us some great moments. I tend to take the view that everybody has something to contribute to the show. The key is to find their niche. All I hope if that WWE keeps up their recent streak of interesting storylines and puts him in something interesting. And most of that comes from them letting their talent shape their storylines (Jericho/HBK, HBK/JBL, etc.)
(On a side note, I find it a little strange that people obsess so much about who should be a main eventer rather than enjoying the entertainment being provided. Who cares if your favorite guy goes on last or first? It's like RVD fans always complaining that he wasn't main eventing. The guy's on every show giving you fantastic matches, but that's not enough? Seems kind of like manufacturing something to be angry about to me. Anyway, that's just my little off-kilter tangent. It's just wrestling people...that's all I'm sayin'.)