If they try things like the Silmarillion, or the Children of Hurin and some of the ancient Middle Earth lore surrounding characters like Morgoth, Sauron and such, it could be compelling stuff. The Elves and Dwarves go back to those times as well, as do the 5 Mythrandir. But adapting it is a challenge. I would hope that Peter Jackson might get involved from a producers standpoint since he knows the material so well. And the design work of artists like John Howe and Alan Lee were a big part of what grounded that production, as were the people at Weta in New Zealand. Amazon should really consider the value of their experience in producing this project if they're really going to go there with a LOTR project.