We can't say a lot about that, but I can say so much that there are animals you can use in the game. For example the Pegasus. With this one you can physically get on top of the animal and fly away controlling it in the air. You can also fight others while airborne.
There is also happening things under water, like in EverQuest. EverQuest was the first game where you could swim around freely under water, and we are taking this a bit further as things will also be taking place under water. There will be underwater dungeons and civilizations as well.