They're not going to reveal what I expect to be the last dungeon in any event before release. I still expect the fourth continent (hopefully the mountain, anyway anything behind those clouds) to make an apperance throughout the game, just wait and see. Available to any bet you wanna make
And... again, if it isn't there, who cares? The game is awesome already and that world is going to be the best setting in an RPG I'll play in this generation.
I'll also enjoy seeing how many players will be playing LR after the enthusiasm iwll spread through reviews and players' feedback once releases.
Just wait and see... we'll remember LR for the next years to come and for positive reasons. It's going to be one of the best FF evah.