How high could (let’s forget that stupid fake title) The Avengers go? The superhero ensemble piece has, just three weeks into its run, already passed $1 billion at the world’s box office. Only 11 other films have managed that feat. It, therefore, seems inevitable that that The Avengers will creep into the all-time top five. Boosted by a recent re-release, Titanic seems out of reach at No 2. Avatar is miles ahead in the top spot. But The Avengers could well make it to No 3.