The Undertaker is backstage at the First Niagara Center in Buffalo, New York - the site of this week's "Old School" episode of WWE Raw. My source is still unable to confirm he'll be on the show but if I were betting, the chances are very good.
In what could end up being an in-house spoiler, WWE features the Undertaker logo on the WWE Active page of their App. I've attached a screenshot that can be viewed below:
As we've noted several times, current creative plans have Undertaker returning for a Wrestlemania 29 feud with CM Punk. We'll have live WWE Raw coverage at 8 PM EST here at WrestlingNewsWorld.com.