Look at the cards, man. WWE can't top that although I will say IMO V is the best Wrestlemania of the classic era and XXIV is the best one from the PG Era since that started in 2008.
The sad thing is that WM 30 COULD have been a great card on paper and potentially delivered something on par. Here's what my dream card would have looked like:
The Brotherhood vs. The Usos vs. The Real Americans (TLC)
Big E vs. Christian vs. Sheamus vs. Mark Henry (IC Title)
The Shield vs. The Wyatt Family
AJ Lee vs. Tamina (Divas Title)
Dolph Ziggler vs. Triple H
CM Punk vs. Brock Lesnar (The Best vs. The Beast II)
The Undertaker vs. John Cena
Randy Orton vs. Batista vs. Daniel Bryan (WWE World Heavyweight Championship)
There's no reason that card couldn't have happened if built properly. Slotting Ziggler into the "company is holding me down" slot against HHH frees up Punk for a rematch with Brock, which allows Taker vs. Cena to happen at the biggest Mania ever, and Bryan could get his deserved spot in the title match after being continually screwed over (and yes, they still could have let Batista win the Rumble). And then you have the undercard, where you could have saved Wyatts vs. Shield for the big show instead of EC... ah well.
There's still a chance that Mania could be a good show, but there's a lot of missed opportunities since the start of this year, which makes it all sting that much more.