You wouldn't say that the excellent build of Batista/HHH in 2005 helped the buyrate? Because Batista wasn't exactly "there" as a main-eventer, and he didn't get there until the show itself, but 21 did a better buyrate than XX, headlined by Benoit/HHH/Michaels in the kind of three-way feud that doesn't get built up great because the focus on individual grudges gets lost in the shuffle. And they both did much better than XIX, which featured title programs of HHH vs Booker, who wasn't really perceived as a main event-level babyface, and Angle/Lesnar, both of whom were stars but not main-event-of-Wrestlemania stars, and then there was Austin/Rock for the millionth time, and Hogan/McMahon, which, well, I think the match was well-built but I don't know how well it drew, and if I suggest that it, a match between two old men, might have been a turnoff for the younger audience I'll be bombarded with "SORRY THEY DIDNT DO A SPACE FLYING TIGER DROP" posts so I'll stop now. But I still think the individual build helps with Wrestlemania, it's just that the show itself isn't going to bomb because it's Wrestlemania, and the fans have been conditioned to know that it's the one show of the year that can't be missed.