Okay, we all know you're going to make a sequel to this. It's just too good not to.
Here's my suggestion (I hope someone with a little pull actually reads this board). Do what hasn't been done in the films or in any video game yet. Go back in time. Way back. Do a Silmarillion setting. The Valar, Aman, Valinor, the awakening of the Children of Iluvatar, The Edain, Numenor. MELKOR. The possibilities are endless.