Horde submarine:
Alliance submarine:
The alliance submarine seems to be operational on land:
http://static.mmo-champion.com/mmoc/...x/uldum_01.jpg
Also I found out that the huge creatures in Vashj'ir are called "demigods" in the files:
http://static.mmo-champion.com/mmoc/...vashjir_21.jpg
http://static.mmo-champion.com/mmoc/...vashjir_41.jpg
And the houses with grass on top of them are marked to be from the Wildhammer Dwarves:
http://static.mmo-champion.com/mmoc/...ghlands_22.jpg