Sasha Banks is the first person born in the 1990s to main event WrestleMania.
Sasha Banks vs Bianca Belair is first WrestleMania main event between two African-American performers of either gender.
Sasha Banks vs Bianca Belair is first women's single's match to main event a WrestleMania.
Before WrestleMania 37, the SmackDown brand main evented two times at WrestleMania (19 & 24). In this show SmackDown brand matches main eventing both nights.
"The Fiend" Bray Wyatt was originally slated to win his match against Randy Orton, but it was changed the day of the show. As it turned out Wyatt was in no mental shape to be performing as he was still dealing with the unexpected death of Jon Huber (aka Luke Harper {WWE} and Brodie Lee {AEW and other promotions}) in December 2020. He was written off TV after TLC 2020 when he was "burned" by Randy Orton for other reasons, but had agreed to return in time for WrestleMania. After the match, he was written off again for more time off.