Copying an old post:
That's just scratching the surface!
The better question may be, "How many box office threads will there be from Dec 18-20?"
TFA vs. Avengers AoU
TFA vs. Jurassic World
TFA vs. Avatar
TFA opening day
TFA midnight screenings
TFA opening weekend
TFA vs other SW movie opening weekends
Did TFA meet Disney's expectations?
Does TFA have legs to reach $1B domestic?
Will TFA reach $2B worldwide?
etc.
That's just scratching the surface!