Here is a list of my favorite movies in order.
The Godfather II
Ben-Hur
Airplane!
Goodfellas
Dr. Strangelove
Seven Samurai
The Texas Chainsaw Massacre
?
Once Upon A Time In The West
French Connection
Which movie below replaces the question mark? Why?
The Executioner's Song
Gandhi
The Good,The Bad And The Ugly
North By Northwest
Note: Capitalization of words not important.
Hint 1
Titles are "in order". That and the Knowledge tag.
Hint 2
Follow the common letter -- also in the title