You would think that with an event as big as WrestleMania, WWE would put all of their efforts into making the right choices and creating the best show possible. While thats normally true, WrestleMania history is filled with just as many errors and disasters as there have been triumphs and moments of joy. There have been bad matches, questionable gimmicks, poor storyline developments, and in some cases, terrible shows overall. WrestleMania is supposed to bring about the absolute best in everyone, from producers and top decision-makers, to curtain-jerkers and main-eventers. Looking back at WrestleManias rich history, however, there must certainly be a lot of things that WWE and Vince in particular, which they had done differently. There are, in fact, few WrestleManias that are actually considered great top to bottom; every single edition of the show has at least one or two downsides that prevent it from being the magnum opus that WrestleMania X-Seven has come to be. This list will look at the 10 biggest WrestleMania-related regrets WWE must have. They put all of their faith into certain performers and into certain decisions, only for those wrestlers to have failed during or after the event, and for the decisions to have blown up in their faces. Hopefully, with WrestleMania Play Button around the corner, WWE can look to the past to prevent history from repeating itself again.