https://www.youtube.com/watch?featur...&v=oD0N5EOqbrE

The extended trailer puts together some more pieces from the original Realm Reborn trailer and adds an additional amount of footage at the end of the land's destruction by Bahamut. We now see where the magician sent the warriors and what the new world looks like in CG. It's <3<3<3. Of course we still do know the basics of the world they go to since Eorzea still is Eorzea, lol.
Also, you can sign up for the beta now.

(Can't embed the video for some reason. I think it's because it's a locked link.)