#1. He may only wrestle in Saudi Arabia

Triple H could follow The Undertaker in making Saudi Arabia shows his new WrestleMania. It's no secret that officials in Saudi Arabia are willing to pay a lot of money to have top legends return to the ring.
The Undertaker hasn't decreased his appearances per se, but he's decided to focus on Saudi Arabia shows more. We don't blame him since it's a great payday for little work.
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Plus, it's beneficial since he doesn't take a spot at WrestleMania and tarnish his legacy. While it isn't the same situation for Triple H, he may begin to wrestle only in Saudi Arabia in special attraction matches.
Admittedly, we would miss seeing his ring entrances at WrestleMania since that's who the biggest budget is allocated to. We could see Triple H having another match at WrestleMania but in 2020, it doesn't seem like the time or place for him to have a marquee match on the biggest show of the year.