A franchise set in the Warcraft Universe. An idea is pitched by a character in the game itself: "So, I have this idea for a great movie. It's about two gnomes who find a bracelet of power, and they have to take it to the Burning Steppes and cast it into the Cauldron. They form the Brotherhood of the Bracelet. Along the way they're trailed by a murloc named Gottom, who's obsessed with the bracelet, and nine bracelet bogeymen. It could be a three-parter, called 'Ruler of the Bracelet'. The first part would be called 'The Brotherhood of the Bracelet', followed by 'A Couple of Towers', with the climactic ending called 'Hey, the King's Back!'"
Though I think a story based on a human character and a not too exotic antagonist would work better.
Althought it would probably never happen, I would really like to a see a Starcraft movie. And don't tell me to watch Starship Troopers/Aliens/Screamers. I want all those movies into one.