
WrestleMania 37 is scheduled to take place at the new SoFi Stadium in Los Angeles on March 28, 2021, but the WWE reportedly is looking into alternatives.
SoFi Stadium, which will host the Los Angeles Rams and Chargers, is still being constructed. It was set to be open on July 25 for a Taylor Swift concert, but stadium officials announced on Friday that the event would be postponed until next year.
— SoFi Stadium (@SoFiStadium) April 17, 2020

On top of that, Los Angeles mayor Eric Garcetti said the city may not allow large events until 2021.
According to WrestleVotes, the uncertainty over whether the stadium will be constructed and whether Los Angeles will allow large crowds has left WWE considering alternatives for WrestleMania 37.
Full disclaimer – it’s far too early to speculate on specific details, however:
WWE has begun researching a “plan B” on an alternative site to host WrestleMania 37 if the state of California is not allowing large gatherings and / or SoFi Stadium is not finished on time.
— WrestleVotes (@WrestleVotes) April 18, 2020
This year’s event was moved from Raymond James Stadium in Tampa to the WWE Performance Center in Orlando and featured a memorable move from Kevin Owens.
H/T WrestlingInc via Big Daddy