The Undertaker has had an additional hip and bear operation after he's been far from the ring. Final year around this time there was question in Taker's strength for WrestleMania but the most recent word is that he's recuperated well and is primed for Miami.
We don't know yet who Taker's adversary is for WrestleMania 28 but word is that it has at present been settled on. WWE officials have reportedly chosen the top a couple WrestleMania matches, combining John Cena vs. The Rock, and Taker's match can be the #2 beat match on the card.