The first thing we have to determine is how well Man of Steel and Monsters University might do in their respective first weekends, because that will have a big impact on everything else. These are both movies that could potentially open over $90 million based on early buzz and their four-quadrant audiences, but how well Man of Steel holds up will depend on whether it delivers on the trailers. It could theoretically make another $45 to 50 million in its second weekend if not for the release of World War Z, a zombie action movie starring Brad Pitt, who has starred in many movies that opened over $40 million, particularly during the summer. That movie could potentially snag some of the male audience from Man of Steel, and to think that three movies might gross $180 million between them on the weekend of June 21 is fairly incredible but not impossible.It's taking on the counter-programming of an action comedy that teams Sandra Bullock (her first movie since 2011's Extremely Loud & Incredibly Close and her first comedy since 2009) and Melissa McCarthy, who already has one box office hit under her belt with Identity Thief. Oh and did we mention that the movie reunites McCarthy with her Bridesmaids director Paul Feig? Those three things alone should allow for an opening at $30 million or more, but again, we're looking at how much box office will be eaten up by the second weekends of Monsters University and World War Z. Honestly, we have more confidence in the former than the latter, which we think will drop more than 55% if it's as problematic as we think. But that makes us wonder whether either of the June 28 movies will be #1 or they'll be falling behind the Pixar sequel, which could be one of the biggest blockbusters of the summer going by the success of Toy Story 3. Basically, we think June 28 will look something like this:#1 White House Down#2 Monsters University#3 The Heat#4 Man of Steel#5 World War Z#6 This is the EndOh, yeah. That reminds us. One movie we didn't mention above is the Seth Rogen-Evan Goldberg apocalypse comedy This is the End (Sony) which has the unenvied task of opening two days before Man of Steel. The good news is that Sony is opening it on Wednesday, similar to Pineapple Express, which gives it two days to build word of mouth among fans of Rogen, Jonah Hill, James Franco and the others and while it may be hard to have much of an impact in a busy month, if it's as funny as we think it will be, it could bring in some trickles of extra business from word-of-mouth and maybe end up in the $75 to 80 million range.Comingsoon.net