While the AAs are great, I think its quite obvious that they fit the attraction around the existing Maelstrom track. Just sayin'.... just imagine a Frozen dark ride, built from scratch in DLP Fantasyland.
And I agree mrpiggywinkles, no need for the 7D Mine Train, just update our existing Blanche-Neige with those new AAs. Surely it'd revive some of the old attractions for less than a complete new attraction.