Yes but it is doable... Only limited WWE staff will be in the building, who will all sign a contract. And they could film alternative endings. If Marvel and Star wars movies can avoid spoilers for months leading up to the release, than wwe can manage 2 days. If needs wrestling reporters to do the right thing also though.
Precorded is a great idea... They can do more spots (around the building and outside), no embarrassing botches from Undertaker or Goldberg. Those matches can go longer also as they can take breaks during the matches to get their wind back. The can be very creative with the Fiend now.
Generally they can give all these matches a movie feel, and be alot more original and entertaining than they would be live.
I was sceptical at first.... But after a week now sitting at home, I'm thrilled we have a Wrestlemania to look forward too. After watching what aew did, there is potential in an empty arena show, and now that it's pre-recorded it can be even more creative.
I'll be buying it.