I know what you meant. But, since the forum meant something like Frozen which I presumed, a movie that will hit $1 billion that is unexpected (sleeper hit) so I'm making a very wild prediction. Also, who knows right?
I'm making a wild card bet here: Lucy (2014).
Scarlett Johansson is so badass and recently films with female heroines are now proven to be able to make money (e.g. Frozen and Maleficent)