I am also wondering how they will handle that fact you can buy tickets for one park per day and not the multi park ticket.
Brian, there's a simple solution to the ticket issue---Universal either stops selling the single park ticket, or requires guests to have the 2-park ticket before they get on the train.
And that Shake Shack will pretty close to the In N Out on Tropicana! Spent many of days after school at that In N Out (and the occasional ride on the NY NY roller coaster)
Also, I can confirm that there will be ticket booths in the Hogwarts Express station for selling upgrades to two-park tickets. It's in the plans I've seen.
I've eaten at the Shake Shack in the Theater District, and I thought it was amazing -- perhaps superior to In-N-Out. But I'm waiting to test that with a proper side-by-side taste test. Now, we just need to get a Burgerville down to Vegas to complete the Holy Trio of fast food burger joints.
From the way I understood it...the Hogwarts Express is an exclusive perk for those with a multi-park pass...and the ticket windows in the stations will allow you to upgrade your pass right there on the spot.
I would expect that on opening day it will be an exclusive and as the years move on and the demand starts to wane, it will be something you can do a there and back again trip on...but not when it opens...the park needs to make money off of this and what better way to gage how a new expansion is than to make it an upcharge for people with a single park pass.
Then again...if they start having angry crowds over this policy, they might radically change it on the fly...
....and you never know until it opens....
Being right there in front of more Harry Potter, tempting you to come in? I doubt many parents would be able to resist. It'd be a tougher walk-away than walking away from the entrance to the Hogwarts Express back over in the other park, where you already have a ticket.
I wished I'd taken a closer look at the Diagon Alley plans, to see if the ticket hall was at the entrance or exit of the Express!
For the round trips, it needs a different show to tie up the loose ends so the show is seamless. I expect the trip to stop at the other end and wait for while until the next train leaves the station.
Of course, another way to deal with the one way round trips is they add pre-show so the guests get a bonus for their trouble.