Piggybacking on a question asked by another commenter in the thread about a possible Rollins replacement for HHH this year. It's a good question.
Triple H does not move the needle the way other part-time performers that have recently been given big Mania spots do. Undertaker is synonymous with WM memories whereas Hunter is largely associated with bad matches at the event. He doesn't have the star power of The Rock, doesn't induce the "big fight feel" like Brock, doesn't have the novelty/nostalgia factor currently working for Goldberg.
Why can't the guy take a year off from the show? I know the company is scared about how many performers it has left that people care about and that's fair. But Hunter's inclusion in that group of beloved names is dubious to begin with and his programs/matches at 'Mania are seen as regrettable more often than not. So why is there this mentality that every January/February, they HAVE to start laying the seeds for a new Triple H feud?
HHH IS a draw, maybe not on the same level as Brock, Rock, Taker etc. But all the names you've mentioned have drawbacks that HHH doesn't.
Taker can't put on a good match anymore, HHH can.
The Rock doesn't need to wrestle anymore even though I'm sure he could still go. He's bigger than the wrestling industry. HHH isn't, he is a big time player in WWE still and has never left.
Brock doesn't have a big fight feel for me at all, he looks like he can't be fucked half the time and the only feel I get from him is that someone is about to get squashed.
Goldberg is getting a reaction but he was never the best in the ring. HHH is a superior performer and as above he is still a draw.
Nobody complains about Jericho being on the scene still. Trips has cut down on his schedule as he's more involved behind the scenes but he can still go just as Jericho can when he's in the ring. So what he wants to perform at WM every year? He justifies it because he still puts on a good match generally and puts guys over, Reigns last WM and Rollins this WM if he is fit to compete.
I wasn't happy about him main eventing last year but it was something that happened due to circumstance. I'm sure if he was main eventing with anyone other than Reigns it wouldn't have caused such an issue.