My two cents: I get the impression the Alice dark ride might be the addition, not the Mine Coaster. One of Lee's comments makes me think that this addition is somewhat out of the blue--something that hasn't been discussed before. If so, that would rule out the Mine Coaster, and would boost the liklihood of the Alice dark ride.
But here's what I'm wondering: if it IS the Alice dark ride, what are the chances that Disney would base the ride on Burton's movie, and NOT the animated film?
Might upset the purists, but I think someone mentioned that the purists might be upset by the proposed changes.