I'm not shocked by the early reviews being positive because they always are, and just like another poster mentioned Batman vs Superman also got a standing ovation
Not from critics they didn’t.
Batman V Superman got early social media praise from random fan screenings, not from critics. WB let fans see it early to post about it but they didn’t do the same thing for critics until the embargo lifted two days before the release of the movie.
Look at all of the people posting praise for Batman V Superman at the premeire
'Batman v Superman' First Reactions Are In
All random fans, no critics. Well one critic, Grace Randolph
WB knew if they would have let critics talk about it early, the impressions would have been horrible so they kept an embargo up until the tuesday before release and allowed random people invited to the premeire to flood twitter with their hot takes.
Marvel is doing the exact opposite of that. The people posting praise about Captain Marvel aren't random people off the street that got a ticket. They are all critics, the people that add their reviews to Rotten Tomatoes and Metacritic.