The Undertaker remains undefeated at WrestleMania: 27-0

At WrestleMania 30 in this timeline, Undertaker defeated Kane in a 16 minute Last Man Standing Inferno Match to become 22-0. Taker won by **** slamming his brother through the mat, sending him straight to Hell and finally putting an end to their decades long rivalry.

The Taker-Lesner feud wouldn't happen until a few weeks later, meaning that they still had their much better match at that year's SummerSlam.

https://www.youtube.com/watch?v=sBBFSuHATmw&t=6s

The plans were to have Roman Reigns be the one to break the streak at WrestleMania 33, but thankfully Vince decided against it at the very last minute, instead making sure that Roman looked very strong in defeat. Like strong to the point were even though Undertaker won, it was framed in a way to make it clear that Roman was the real winner.

The Streak lasted right up to WrestleMania 36 when Taker - in his American Badass gimmick - defeated AJ Styles in the cinematic Boneyard Match. Big Evil riding into the night with his fist raised high, signaling the end of his in-ring career.