Don't expect Battleship to knock The Avengers off the top spot this weekend. While the movie based on the board game ought to rake in over $30 million the next three days, it might have to double that amount to top Marvel's greatest heroes. 

Going by the rule that weekend grosses lessen by 50% every week, The Avengers is set to make another $50 million-plus. That would put the film at $450 million domestic. The superhero film has already broken into the top ten list for worldwide grosses, beating Star Wars: The Phantom Menace and The Dark Knight.

Even if numbers slack for The Avengers, it may very well hold onto the top spot for a few more weeks, until it holds stiffer competition in late June and early July.