To follow-up on an earlier item regarding Undertakernot working SummerSlam, we are able to confirm the determining factor came down to money.
Undertaker realizes at this point in his career he doesn't have many matches left and couldn't justify doing a match on a major pay-per-view that was essentially a midcard tag match (the bout was believed to be a tag match with Kane against The Shield). According to a source speaking under the condition of anonymity, Undertaker wanted "certain financial assurances" on what his payoff would be. When he was unable to get those assurances, he chose to sit this one out.
As of this writing Undertaker is expected to work Wrestlemania XXX next year.
Richard Reacts: I don't want this article to put Undertaker in a negative light. He, like Steve Austin, knows the risks that working a match poses to his body. He doesn't need the money but isn't going to work for less than he feels a match out of his body is worth. I do not blame him and others shouldn't either. This is the business side of things.