I think it's pretty clear from the trailer that Ender knows what he's doing. IIRC (I read the book almost 20 years ago) he thinks he's still in training exercises when he's actually in real combat. Maybe the trailer is misleading, but if they have Ender knowing he's in real battle that will change the entire tone of the story. Sort of like they did with Blade Runner vs. Do Androids Dream of Electric Sheep.

Agree, there's nothing clean about biomass fuel. Fine, the nuts with the oil fields won't get our money but we all still die.

Really? Compared to what? I've been programming java since it came out and I've come across far fewer bugs in the the JDK than I have in any of the other languages that have been around for a similar amount of time (PHP, Perl, etc.)