I'm sorry but I have to disagree, and I'm sure many others would too.$1.5B is definitely the new milestone. Pre-Avatar and its eventual 3D onslaught, only 1 film had crossed $1.5B WW. Yes, only one film has crossed the mark Post-Avatar, too, but with the aid of 3D (not in any way taking away from the fact it was a fantastic film).3 films had made between $1B - $1.5 pre-Avatar. Post-Avatar, 7 films have made over $1B WW. 3D has helped a lot of films cross a once-thought 'rare' milestone. Not only that, films that had previously made <$1B WW have now crossed the milestone thanks to a rerelease. As for the 2D films - 2 post Avatar, and there is no denying that, not limited to these two films only, a market filled with expensive 3D films will sometime force people to watch a readily available 2D movie. (And let's not get started on inflation helping films cross the mark either).All I'm saying is that since the onslaught of 3D, the $1B threshold has lost it's 'wonder' - it's hit multiple times a year and is almost a guarantee.