If they have something planned for him it should involve Edge. Christian is just not getting the right reactions from the WWE fans.
Christian was getting ridiculous reactions in 2011 until they started to really screw him over. He even got a ridiculous reaction when he hit Orton with the title the first time.
The problem is, after that, they booked him like Yoshi Tatsu for an entire year and then he got hurt.
I looked pretty terrible when he had a 3 month feud with Sheamus, never won, and had all of his impact moves kicked out at 1. What a joke.
Then when he returns from injury, instead of throwing him into a huge storyline, they basically just say "meh" by having him COME BACK ON A FREAKING PRE-SHOW!
The least they could have done is had the Battle Royal about the start on PPV and had him come back then. I didn't watch the pre-show, I just watched the PPV and I didn't even realize Christian was there for about a minute or two. Kind of stupid.
Then they change his finisher, then they change it back. And then they just did nothing with him at all. He lost to the Miz twice - thought maybe a feud was starting because he followed that up with poking Miz in the eye and beating him on RAW in a Tag-Match.
Then Christian defeated Cesaro for his first ever loss, then the week right after that (I'm guessing he asked for the time off before that), they had him lose to Sandow in 5 seconds, despite Sandow getting distracted.
They gave Christian the jobber entrance so many times on RAW in the past year.
If he came back and they actually made a big deal of it, he'd be over again. No doubt.