#6 The Undertaker Retires
Please...let Mark Calaway retire already. The Undertaker has had so many unofficial retirements and moments that were supposedly his last in the ring that at first, it was frightening to watch him make his in-ring return amidst the hip surgery news after getting his streak broken at WrestleMania 30.
Nonetheless, he returned and it was plain sad watching him trying and miserably failing to perform a move-set he has mastered over the years (a la his match with Reigns at WrestleMania 33).
As we speak, The Deadman has taken part in some extremely high profile bouts in 2018 alone but none of them was good enough for an honourable mention. At this point, it doesn't matter if he stays or leaves. The Undertaker's stock has considerably fallen in the long-term fans' eyes and the only reason why he has to retire and open the main event slot for someone like Finn Balor.
The guy has done it all in the squared circle and gained everyone's respect in doing so. It's high time WWE realizes that The Phenom has long over-stayed fans' emotional connection with him and they see right through his recent appearances at events like Crown Jewel and Super-Showdown being nothing more than a few lucrative paydays.