Ebert & Roeper gave it 2 thumbs up. Most reviews are positive so far (see rotten tomatoes site). It's pretty much impossible for the movie to be a B.O. 'dud'
At 3500 theaters it will have huge opening numbers. From there it depends on whether word of mouth says as to if it's too boring for the 1st hour where there's no Hulk. $150 million should be guaranteed. Event that turd 'Godzilla' remake had huge B.O. even though it disappointed in what was expected. Hulk will either be a hit or a smash hit.
MVL has 4 or 5 movies next year, including 50% box office gross take on Punisher. MVL also will rake in big dough if a Hulk sequel gets made, which is why they settled for a $5 mill cap on Hulk.