A sentient virus (AI) within the WWE's computer network system?
First, Edge gets electrocuted during his ladder match at TLC by a lightning bolt from the ceiling, as he is climbing the ladder about to grab the WHC title. (WWE is good w/ pyrotechnics!)
For some reason he shows up on RAW demanding to know which bastard backstage did that to him. He then goes around beating up clueless WWE staff working the machines. Then after spearing several people, he gets tired and rests on a nearby computer console, which electrocutes him.
The next week he comes out with a cast (OK he's electrocuted, but he's gotta show some kinda injury... maybe have his hair uber-spiked and in the air?), and at the end of RAW is really pissed off standing in the ring, calling this person out to the ring. Then, the RAW GM sends an email to Cole saying "It was me. You have angered me for the last time. You want some, come get some".
Then Edge jumps out of the ring, sprints up the ramp and trys to go backstage. Before that, there is a pyrotechnics explosion which blasts Edge down the ramp again. Then, THIS (or something like it) shows up on the Tron:
It gloats about how it's overtaken the WWE's computer systems and there is nothing anybody can do about it. All the WWE Superstars (and backstage staff) are from now on its playthings.
Oh, and Wade Barrett is working for the AI, who named his group 'The Nexus' for irony and lulz.