According to the latest Wrestling Observer Radio, The Undertaker’s contract with WWE is set to expire very soon although it's not all bad news as the plan is for Undertaker and WWE to negotiate a new contract that would go beyond the standard Legends contract.
The official WWE website has teased Undertaker vs. Sting at AT&T Stadium for WrestleMania 32 and Undertaker himself reportedly expressed interest during WrestleMania 31 to face "The Icon" in what could be his last match.