#3 He's not needed at WrestleMania anymore
For the first time in a long time, we can truly say that the WrestleMania card does not need The Undertaker. In fact, you could argue the same about the two prior years as well, but The Undertaker still had some drawing power.
This WrestleMania, we're going to get Seth Rollins vs Brock Lesnar, Daniel Bryan walking in as WWE Champion, a Triple Threat main event featuring Women on top of the card for the first time ever, and more.
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This is actually shaping up to be one of the most exciting WrestleMania cards in recent memory (though 34 was undoubtedly a great one as well), and with all the star power and the fact that WrestleMania now sells itself, The Undertaker really isn't needed to draw anymore.
He's done his duty because the event has come to define him. But there comes a time to step back, and this is exactly it.