Godzilla isn't just the King of the Monsters this weekend, the big guy is also poised to be the king of the box office, stomping his way to a $50 million domestic opening weekend. Godzilla is beating out fellow newcomers Rocketman and Ma, which are looking at first frames of $22 million and $20 million, respectively. Disney's Aladdin is expected to gross $41 million in its second frame -- a respectable number, but not enough to repeat as the box office champ. Directed by Michael Dougherty, Godzilla: King of the Monsters' opening simply has to be seen as a …