Partial source: PWInsider
– There is a lot of concern within WWE over The Undertaker’s health and long-term viability, especially after his work in Puerto Rico a few weeks ago. When he had hip surgery after WrestleMania, it was portrayed to everyone as something minor that was being taken care but the reality is that Taker had pretty major surgery. Some sources are claiming a hip replacement. At one point, there were concerns that he might not get back in the ring at all.
Taker is said to have been in pain a lot as of late and was noticeably slower, which is one of the reasons his Breaking Point match with CM Punk was only booked to go nine minutes. While nothing has been said yet, some sources are speculating if The Undertaker may retire by WrestleMania 26.