If one would make a super dark Zelda movie with a silent anti-hero Link and a Gandorf that ISN'T evil just because he feals like it, that could make a epic movie, as long as there ain't no navi.
I'd also like to se a movie of Leauge of Legends, way to much lore for the way the game plays. (it can't be focused on one character tho, that wouldn't work, one event would be much better, like a battle)
warhammer 40k (not just games, i know) could also make a good movie, tough what side would be the good one is questionable...
pretty much any game CAN be made into a good movie, sadly, most people dosn't know what good is... Legend of the Seeker is a great example of this (not a movie, but the series still suck)
and so is the Eragon movie, god, I can write better stuff then that in english and all, and i am F***ing swedish (i write great books in Swedish tho), Hell i can write better series then Legend of the Seeker in two hours (a season, that is)
Yes, i am ranting, yes i am insane, but hell, i am right!