#2 Open the show
Alexa Bliss can make an appearance in the opening of the show, as WrestleMania usually begins with a former superstar's appearance.
Similar to what happened at WrestleMania 30, when Hulk Hogan opened the event along with "Stone Cold" Steve Austin and The Rock in a memorable segment.
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Bliss can also do the same, she could open the show to reveal the attendance figure or host "A Moment of Bliss" with a former Hall of Famer or any current superstar to make a memorable segment of the night.
#1 Interfere in any Women's Championship match
Alexa Bliss could possibly interfere in any of the Women's Championship match of the night. As there will be three women's titles defended at WrestleMania this year.
Ronda Rousey will defend Raw Women's Title, Asuka will defend SmackDown Women's Title and The Boss 'n' Hug Connection will defend their WWE Women's Tag Team Titles.
Similar to what happened when The Rock hosted WrestleMania 27 in 2011 when he interfered in the WWE Championship match between The Miz and John Cena and helped The Miz retain his title against Cena to set-up a match between him and Cena for WrestleMania 28.
Bliss can also interfere and cost any women her championship match, or she could insert herself into any of the title matches and possibly walk out as champion.