Firaxis has given us a few more interesting pieces of information today.
The revealed the Inca, which are an economic and expansionist civ with a starting bias for mountains, deserts, plains and coast. They can work mountain tiles, build famrs on rough pieces of land next to mountains, and their scout can see through mountains. And obviously they get Machu Pikchu as their associated wonder. For more info check this thread.
You might want to play this civ with Pachacuti, one of the Inca’s best known leader. He is also economic and expansionist leader with a starting bias for mountains. He likes and dislikes other leaders based on the number of mountains they have, and his buildings get food boni next to mountains. For more info please check this thread.
Firaxis has also released a small videos about leaders, and how you develop them with new abilities. Check it out here.