Hmmm,
1) Why was Achilles of all people the central character? Its all about Odysseus and his relationship to Athena (cunning over brute strength).
2) Did they background Paris was doomed because 3 Goddesses cornered him to truthfully pick the most beautiful of them, promising him if he did he would be given the most beautiful women as a wife? He told the truth (and gave the apple to Aphrodite) pissing off the two less pretty, but far more more powerfully goddesses; so they doomed Paris and Helen to meet and scamper, forefilling there promise but mightily pissing off the Spartans; which was not exactly calculated to extent your life expectancy in those days?
3) Bet Odysseus didn't first meet Achilles when he was dressed in women's clothes hiding as one of the girls in a ruler's harem! Odysseus was called to find who make a harem girl pregant. He suspected one of the the girls wasn't so he brought along a magnificant suit of armour. Of all the harem girls only Achilles was transfixed by the armour and Odysseus nabbed him and brought him along to Troy where Achilles completely distinguised himself in 23 of the first major battles.
4) Bet they glossed over Achilles was going to exit Troy, until his lover used his armour to get Hector to fight him. Hector was doomed to die at Troy if he fought Achilles. But Hector was incredibly brave and when he saw 'Achilles' he fought him and incredibly won! Only to learn the man he killed was not Achilles but his lover. Hector sealed his own doom. Achilles heard of his lovers death at Hector's hands and promptly came back and made total mincemeat of him.
5) WTF is a Greek Helen blonde? What lamebrain thought up that idea?
What I have heard of this film, versus the story, its an excuse for lots of shallow heoric battles with little depth that so incredibly enriched the original masterpiece. The enriching details where too controversial or out there so Hollywood sanitised them for mass appeal and simply left them out!