While it's extremely controversial, WWE has an ongoing relationship with Saudi Arabia and they will return to the country on May 3rd. An announcement hasn't been made about what that will be called or whether it will be shown on the WWE Network but the Wrestling Observer Newsletter reports that The Undertaker will be in action.
It's hard to say where he would fit into this year's WrestleMania and it makes sense that he's coming back for this show as it will be a guaranteed big pay day.
In recent months, The Deadman has been taking on various signings and appearances outside of WWE and that's led to a lot of speculation that his relationship with the company could be on the outs. This clearly points to that not being the case and it will be interesting seeing who he faces.
On that note, how cool would it be for him to make a surprise appearance at WrestleMania to attack someone like Seth Rollins?