Movies turned into games - great, when they're not rushed by some [censored] developer.
Games turned into movies - no thanks. The only movie based on a game I can think of that I actually enjoyed was Mortal Kombat, and that was mostly because I loved the soundtrack as a kid.
And as far as the Elder Scrolls franchise is concerned, the fantasy has always been very generic, and the series has never really been about telling great stories. The strength of the series really lies in the player's freedom to create the character they want and to explore an open world - experiences that just wouldn't translate at all to a film screen.
I just don't see any reason for someone to make a movie out of it, beyond brand recognition... which would just be a horrible way of selling out.