Sure it is going to be available in 2D, if you don't mind travelling half an hour outside the city centre a week after the premiere to sit in a small shoe-box paying a premium to get a theatre experience that is no better than what you could get with BluRay at home once the disc has been released.
Seeing the movie on opening night with fellow Star Wars fans is important. There is the line, and the pre-party, and the activities before the theatre doors opens at midnight. Only real Star Wars fans go to see it at that time ... And then: "Here, let's put these goggles on you so you can't see the movie properly. You will hear the movie but left eye's image is blended into the image for the the right eye and vice versa and things seem to be at different depths but you can't focus so you get eye-strain and a head-ache, and your friend who doesn't have 20-20 vision like you can only see the movie with his left eye.".