It's over. They blew it.
A lot of the things mentioned in the negative reviews sound like legit concerns, and the fact that the movie is at a 71% after only 35 reviews is not a good sign.
"Huuuur! There's 200 more reviews to go!"
Doesn't matter. Tomatometer's rarely continue to climb through a negative score. It's also a pretty good sample of what it's gonna be once most of the reviews start rolling in. It's looking like they'll be 3-4 bad reviews for every 10 that pops up. So while not a "bad" film, it's still bad given how much is riding on this film for the future of DC films, and because of the insane amount of hype and promotions this film has received. So even if it manages to stay in the 60-75% range, it's still a disappointment.
This will quite possibly affect it's box office intake and MoS probably won't see that huge intake that everyone and WB was hoping for. It may end up being a decent film, but decent is not enough.
So once again, they dropped the ball, and DC will continue to look like the poor man's version of Marvel from the average movie goers eyes. Bravo Zack and Goyer. Bravo.