Is it too late to change the title to something...interesting? Creative, perhaps?
I was really shocked when the announced the subtitles for Thor 2 and Captain America 2 that they didn't announce one for this. It would have liked to get something a little more interesting than just Iron Man 3.
They already went with Iron Man 2 for the second movie. It would have been too out of place if they had titled the third movie anything other then Iron Man 3.
They will do something different for the fourth movie though. Movies tend to drop the numbers after the third.
I see them going with The Invincible Iron Man
as the title if this series ever gets rebooted though.