The whole thing will appear authentic from the outside. I had conjectured that perhaps they might pull a facade thing 8-10 months ago, but I have since "seen things" labeled "CONFIDENTIAL" (which I guess means I was the only one who was supposed to see them
). The interesting thing that has not been discussed, and I will be somewhat vague here, is that it appears that the entire HE will be supported and guided in the center (monorail style), and will not touch any left and right rails. There will perhaps be rails, but just for empty station decor.
Perhaps someone else can chime in lest I am mistaken.