Jim Ross wrote on his blog about Luke Harper as a potential opponent for the Undertaker at WrestleMania:
“I firmly believe that a talent can be made ready for Wrestlemania in April by starting in January. For example, Luke Harper could be heated up to face Taker on April 3 with the threat of the Wyatts looming over Taker’s head in Texas. In other words, it is all about smart booking, rocket shipping the talent by getting them on a roll which WWE seems reluctant to do at times.”
SOURCE: JRSBARBQ
Never really considered Luke Harper as an option for a potential Undertaker WrestleMania match. It has me intrigued as Harper is a very good wrestler and would be something unexpected. I do think whoever faces Undertaker should be a younger star who uses the match against the deadman to really jump into the main event picture. I don't know if fans want to see 'Taker vs another aging star...