The Undertaker is a living legend in WWE and his contract makes sure he will be with WWE until he is 70. He signed the 15-year contract due to Taker agreeing to participate in Starrcast.
The Undertaker signed the 15-year contract to pacify Vince McMahon, who did not take his participating in Starrcast well. While it was simply just an autograph signing for him, some fans assumed it was a possible sign of him going to AEW
During The Last Ride series, The Undertaker talked about a conversation he had with Vince McMahon regarding AEW. He assured McMahon he was not going to AEW, but that did not help much in making McMahon feel better.
“Vince calls me and he says, ‘What are you doing?’ I said I was doing this signing. He goes, ‘But yeah, you’ve got all these people thinking you’re going to do this [AEW PPV]. I thought, ‘Well, that’s stupid. Anybody that knows anything about me knows that I’m not going to a different company. I’ve been here forever. I ain’t going anywhere. I’m not going to jump ship to go to [AEW]. Why would I?’ Vince and I had a little bit of a falling out over it and I understand where he was coming from. He [has] got a business to run and I understand his position, but I also had a position of my own that needed to be understood. And we didn’t talk for a little while, and then, we both let our guard down enough to talk. And then, we had things worked out. It [has] all been sunshine and rainbows since.”
The Undertaker and Kurt Angle both signed a new contract around that time. They were then removed from making appearances at Starrcast.