Still, not too great expectations. It's just another sci-fi war movie. The universe is just too... "usual" for anything else if one is concentrating on these major events.
In my opinion the only way that the movie could actually be interesting is that it wouldn't focus on the major incidents (mainly wars) but have a very independent, smaller-scale storyline not trying so hard to have as many references to the games as possible. Because that would allow for something original and actually interesting instead of just the usual fight - love - big fight thing these things have.
And you know the characters are just going to be machos. Especially if there's the "biotic bootcamp" stuff that you mentioned