Top 10 Opening Days
1- Avengers: Age of Ultron 3D
2- The Amazing Spider-Man 2
3- Spider-Man 3
4- Transformers: Age of Extinction
5- Pirates of the Caribbean 3
6- Iron Man 3
7- Harry Potter 7-2
8- Deadpool
9- The Avengers
10- The Martian*
If this estimate turns out to be true, Deadpool will be only the 2nd film released in 2D to make the top 10 opening days of all time. Other factors that hindered Deadpool's potential opening day gross include not enough screens (theaters only placed this in 1 or 2 screens -- attendance rate was extremely high), the dreaded Category III rating (equivalent to a NC-17 rating in the US) and not all theaters were showing this. Though people will argue that it was released on a holiday, these 4 factors are huge in limiting gross. This is a truly impressive opening day, probably the most surprising given that it is not a sequel to a well known release either.