Here's what you could get:
2 possible openings: Darth Vader or Imperial probe droid
4 possible first destinations: Hoth, Tatooine, Kashyyk, or Jakku
4 possible hologram transmissions: Leia, Akbar, Yoda, BB8
3 possible final destinations: Death Star/Geonosis, Naboo, Coruscant
Those saying there are 54 possible combinations forget that the math needed to be redone late last year after a new first destination (Jakku) and new hologram transmission (BB8) were added to show scenes and characters from The Force Awakens.
The old math was 2x3x3x3= 54
The new math is 2x4x4x3= 96.
So now there are 96 possible combinations of ride experience. This, of course, doesn't mean that you need to ride 96 times to see every scene.