Oh no... not what you think. All of the opinions about the trailer (movie.trailer != movie), the rants about Card's personal views, the woe and despair over how bad everything is and the doom of sci-fi... 100% conjecture, categorically unprovable.
What this thread does prove is how pivotal and evocative Ender's Game, as a work of literature, is and will continue to be for the science fiction genre. This thread would not be so controversial if this wasn't already true.
I read the novel right after HS graduation. (yeah, go fig'... I'm a "seven digit"... how did that happen!?) There's more strong opinions here than there were at the NRA conference-nay-coronation-ceremony, and in the same light, the same tones are struck about the same old flawed arguments. Despite that, or rather because of it, this is clearly one of the greatest works in all of science fiction!
I'm going to see it, and pay to do so—in theaters and in 3D—not because I think the trailer depicts a good movie, but because I don't believe that a trailer is always an accurate synopsis of the film. (e.g., remember the Matrix trailer? How about any of the M. Night Shyamalan works? Those didn't reveal the entire plot, either.) Just because we know how it ends doesn't mean we know how the movie gets there.
No piece of cinematographic work can be measured by how it ends, for it is the journey that entertains. Anyone who claims that their judgement is certainty is only upholding the theory of self-fulfilling prophecies. Plain and simple; you don't know until you've seen the whole thing.
As for Mr. Card's personal views, I may not agree with them, but I will defend to the death his right to have a different viewpoint. In the meantime, if he can continue to create and imagine deep characters and interesting plots, then I will continue to appreciate his work. Doing so does not–in any way–validate Mr. Card's personal views, saying "I agree with Mr. Card's views," does.
In the same sense, paying to see Tom Cruise in Oblivion is not supporting Scientology in any way. I just happen to believe that The Last Samurai was the absolute last movie wherein Mr. Cruise played a believable character. Also, I'm not going to pay to see another movie with Morgan Freeman having to explain everything to a clueless protagonist; although I do love Morgan Freeman as an actor... and titty sprinkles.