Chris Jericho actually flew to WWE headquarters in Connecticut a while back and met with Vince McMahon to map out his return according to the Wrestling Observer. These meetings were taking place at the same time Jericho was claiming that he would never work with WWE again.
The cryptic videos leading to Jericho's return were WWE's Social Networking Department's idea. Several in the company felt that the campaign was too smart for its own good before they started airing.
During Jericho's unique return at Monday's RAW Supershow, people backstage were noting the similarities to the Dynamic Dudes character that John Laurinaitis played years ago.
Most expect Jericho to begin feuding with WWE Champion CM Punk, leading to a WrestleMania match. There is no word yet on exactly how long Jericho is back for, but there was speculation going around that he will be involved in a major program after WrestleMania 28 with a match at SummerSlam.