They shouldn't market this as just a love triangle.... spoilerish
I don't think that it's a good idea to market this book as a love triangle. I for one never get tired of love triangles so this isn't coming from someone who is just hating and bored of the same old love triangles. But the truth of it is, there are a lot of love triangles going around these days and well according to me that's fine but.... this story isn't really a love triangle.... Therefore all they're doing is pushing away those that hate the idea of another twilight love triangle story and then for those that like it will probably end up being disappointed.
again spoilerish if you haven't read to the end of Rapture
Sure Cam seems like an option in the first book, and he's totally awesome, but when you read the ending you realize that was never ever even an option .... like not even close. He's just the amazingly hot friend that maybe you'd wanna bone a few times but not your soul mate (in Luce's case I mean of course ) And yea maybe another person could then be considered the other part of the triangle but we don't learn that until very end. I found the ending and putting all of it together to be really really cool. I wasn't sure how much I liked the series throughout the second and third books, it took me a while to get through them but the ending totally won me over. Just awesome. I think the movie will do better if it focuses on that and what sets it apart rather than another plain old love triangle (though I do love those )
just my two sense, take it and run.