I don´t see any reason why WOM won´t be stellar on this. WB´s is doing everything they can with so many screenings, they know they have a winner on their side.
Letterboxd is becoming more and more mainstream. It isn´t what it was say 2 years ago. In a couple of years it will be bigger than IMDb imo. At least for movies.
I really wonder the reason for the late embargo if they´re showing it to press already. Spoilers will be out the minute the press starts getting it. So can´t imagine that´s the reason.