Build the structure like a snowcapped Matterhorn version of Journey to the center of the Earth. Build the story around a mine shaft that was abandoned because of strange sightings of a legendary creature, the dissapearences of workers will have forced the mine to close in the 1940's this will be where the Legend of the Yeti part comes in. Guests will board a mine train through the mountain as they begin to realize more and more the strange presence and eiree atmosphere inhabitted by the yeti or abominable snowman of Forbidden Mountain. As the cars pick up speed through the mountain they approach a dead end only to be attacked by a large animatronic yeti the only way to escape will send passengers careening backwards through Forbidden Mountain to escape the yeti. In a sense the ride can be a combination of great technologies previously used in attractions like BTMRR, the Matterhorn, Journey to the Center of the Earth and Maelstrom, but I guess we'll just have to wait for an announcent and details about the ride.