I wonder if they will extrapolate the history of the last alliance of Men and Elves, and the one ring. Isildur’s fall under the spell of the one ring would have a proper Game of Thrones feel to it.
or they could do the fall of Numedor.
Yep, that was my thought exactly — start on Numenor with the capture of Sauron and the corruption of men. It would have the dark feel and rich storyline that made GoT so popular. You could see the first two seasons take you through the Last Alliance.