Alright, this much is already known!
Christian Cage's TNA contract is set to expire this week. The WWE has offered him a contract three times as much as TNA has offered, so everyone's belief is that he is headed back to the WWE.
The two rumors circulating right now is that he will either be one of the last entry's into the Royal Rumble, winning it and getting his title shot. The other is of course if you have seen this past week's Smackdown. Vicki Guerrero stated that the Hardy's are again together and next week it will be The Hardy's vs. Edge and Big Show.
Now this could be the starting point of where Christian's storyline. The Hardy's could wind up winning the match setting up Edge making a challenge at the Royal Rumble which will be The Hardy's vs. Edge and a partner of his choosing.
Eventually, of course, Edge and Christian wind up feuding further down the road and Christian beats Edge for the title.
Again, these are just rumors. BUT, wrestler observers and writters everywhere do expect Christian Cage making his long awaited return to the WWE nonetheless at the Royal Rumble!!!