I don't see the problem.
Exactly. After spending five minutes groping about in the dark hallway just after the stretching room, your eyes are just barely used to the dark. A bright flash right in your face, and you're going to need another 5 minutes to re-adapt. By that time, you'll be cursing the Little Bride at the end...It’s called night blindness.
It is a great location for on-ride photos - as long as you just use it for fun poses and finger guns.While they're at it, can they move space mountain's photo spot to a location that captures more thrills? Such a wasted shot on a relatively basic turn before all the fun..
I'll take a wait-and-see approach. Modern digital photography can do wonders without flash if the setup is done properly. It's conceivable there could be an on-ride photo without flash or even one with flash that blends into the ride effects, for example, in the portrait hall they have lightning flashes that might hide the camera flash.
Until someone rides and can report where and how it's done, everything is speculation.