In September 2009, it was reported that the city of was seeking to host WrestleMania XXVII at the . Atlanta's main rival bid came from the city of who proposed to host the event at along with at the and the ceremony at the . Miami would eventually become the host for . Atlanta was formally announced as the site at a press conference on February 1, 2010. According to WWE's senior vice president of special events, John Saboor, Atlanta was ultimately chosen for, among other reasons, "their track record of success with large events, rich in its tradition with the WWE, great infrastructure." The event marked the first time WrestleMania has been held in the state of .
Another plot building up towards WrestleMania involved and . Beginning the year, CM Punk became the leader of the . At the Punk cost Orton the telling him that it was his revenge for Orton by punting him at in 2008 Punk is the World Heavyweight Champion and he is unable to defend his in a championship scramble which he had to forfeit. On February 28 the scheduled a match between Punk and Orton. In addition, the General Manager said that Orton will face one of the members of the New Nexus each week. If Orton lost, his opponents would be allowed to be in Punk's corner at WrestleMania; if he won, his opponent are banned from attending the event. Orton won all of his matches so and are banned from ringside. Before WrestleMania, Punk hit Orton's right leg with a wrench after Punk used Orton's wife as bait to lure Orton to the parking lot.
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Along with WrestleMania XXVII, a series of events grouped as "WrestleMania Week" was held in the week preceding the event including WrestleMania's annual , the 2011 WWE Hall of Fame ceremony, the fourth annual exhibition and auction, and a Celebrity Pro-Am Golf tournament. was held at the , while the WWE Hall of Fame ceremony took place at the . It was the first pay-per-view event under WWE's promotional rights deal with . Under the deal, Kmart will be the official sponsor for all of WWE's live events in the United States for the rest of 2011. As another part of the promotion for the event, released a "Guide to WrestleMania XXVII" app for the , and , offering information about the upcoming event as well as trivia from past events.
Starting from the January 31 episode of , mysterious vignettes began promoting an upcoming event on "2.21.11". On the February 21 edition of , was revealed as the mysterious figure, who made his return after a four-month absence. However, Undertaker's return was interrupted by a returning . The two men stared each other down and both peered at the WrestleMania marquee, teasing a possible challenge at WrestleMania XXVII. The match was confirmed four days later on WWE's official website. This match marks the second time the two would face each other at a WrestleMania, the first being ten years earlier. Before their WrestleMania match, both men had a face to face encounter on the March 28 episode of , only to be interrupted by Shawn Michaels, who critictized Triple H for believing that he could defeat The Undertaker at the event, something that Michaels wasn't able to do. After The Undertaker said that Michaels was history, Michaels attempted to superkick him, but The Undertaker retaliated with a chokeslam that was stopped by Triple H, who then asked Michaels why he is going to defeat The Undertaker at WrestleMania. Michaels, however, left the ring, unable to give Triple H an answer, believing that Triple H couldn't defeat The Undertaker at the event.