Re: the leaked (fake) picture and the subsequent discussion of the quality of the Frostrom attraction - be careful what you wish for.
There is every indication that the quality of what is inside the attraction as being very good. AA's, projection mapping, colorful sets... it's all going to be a part of it. The result is likely going to be too good actually for the very limited scope (short duration and ambition) and capacity woes the attraction will have. When you combine that quality with built in high demand for the IP and the hunger for anything new at WDW, you have every right to sit back and grab the popcorn to watch the train wreck waiting to happen.
In many ways, having an attraction where the end result would've looked like the ghost train leaked photo would've been better than what is sure to be a high quality experience... that is way too lacking capacity... that is way too limited in scope... that is in the wrong place in the park... that is in entirely the wrong park to begin with.
We will soon be in a World where entire vacations are planned around when guests will attempt to conquer this attraction. No amount of virtual queuing/crowd steering will be able to keep supply on the winning side over the demand this thing will have.