Had this thought about a Frozen ride in WDW....
It would be great if they could use the undeveloped land north of Fantasyland (inside the railroad berm) to create a "winter" part of fantasyland. I'll call it "Winter Wonderland" for lack of a better name. It would be themed to having snow and ice, somewhat like Blizzard Beach.
You access Winter Wonderland via a path between Mermaid and the circus going north, this will be a bridge that goes over the access road below. Lining this walkway, there will be artificial flora that goes from brightly in bloom to an autumn look to having bare trees with artificial ice cycles and the like.
The land itself would have a Frozen dark ride, maybe an omnimoveer for high capacity that would showcase the songs from the film. There would be a standard M&G nearby, hopefully with Olaf in some form (AA or meetable fur character). The other large attraction would be... the Matterhorn, with its snow covered peak providing a "weenie" in the back of the park advertising this new land. Persumably, there would also be some food (got to have ice cream and other frozen treats) and merch in the area. Certainly another small ride would be great as well, themed to the cold and snow, but I'm pushing it as is knowing TDO.
Furthermore, to be particularly engaging, I'd propose that the northern half of the MK RR be shut down during this development for any or all of the following builds:
1. The Matterhorn be build over the railroad, so that when you are riding the railroad through the mountain, you can see the bobsleds of the ride zooming around. Similar to how the RR goes through Splash.
2. You can build an additional railroad stop specifically for this land. That way, there is another entrance/exit beyond just the one path
3. MK could finally get a diorama built similar to other castle parks. Something that you could pass through during the long (and somewhat boring) part of the ride between Frontierland and Fantasyland -- the Grand Canyon diorama would be quite apprpriate to tie into Frontierland or thery could do something new.
I just think a big scale thing like this would be great in anticipation of MK's 50th anniversary.