I went with Discworld, simply because so far they've tackled universally popular franchises. Twilight would be ideal, but I think a lot of people would be turned off because of the sparkles. I don't think enough people will be aware of Jersey Shore or Wheel of Time. I doubt many people who don't indulge much in games will care at all about StarCraft, but at least Discworld is breaching several mediums at the moment so in a couple of years maybe when more films have come out, I would say they should go for it.