Actually a 1,200 seat theatre is even a little big for Q. And does Vegas have a special Equity contract allowing ten shows a week instead of eight or will this be a non-union production? I know that Equity does allow more performances if the show is under 90 minutes, but that would mean cutting and/or eliminating the intermission... oh wait... that was what shows used to do in vegas.
Equity has special contracts all over the country. Even Ford's Theatre has it's own special "Historical Theatre" contract.
A show can run more than 8, full-length, performances a week if the producers are willing to ante up the money. They also would have the option of having two casts with a bunch of swings. *Going back to Ford's - when they run their version of
A Christmas Carol, they have some 9, 10 and 11 shows weeks - they even had a 12-show week once. And that show is definitely not 90 minutes of less.
If the theatre is configured correctly, 1200 seats could work out very well.
In other words, anything is possible.
I'm just hoping that the Vegas run will have the same accessibility options that they provide in New York.