The most obvious new spin that Nolan brings to the source material is a subplot based on a story from the Aeneid, describing the way the Trojans were tricked into taking the Trojan Horse (an invention of ‘cruel Ulysses’) into the city, thanks to the machinations of a Greek double agent called Sinon (his name means ‘harmful’). In contrast to the relatively positive representation of cunning intelligence in Homer’s Odyssey, Virgil makes Ulysses cruel and predatory; Sinon is his deceitful accomplice.

In Nolan’s movie, Sinon is played by Elliot Page, and far from being a bad guy he’s the film’s moral centre. He is recruited to the Trojan War as a plucky youngster, thanks to the evil machinations of a teenage draft-dodger, Antinous (played in adulthood by a charismatically slimy Robert Pattinson). The main emotional arc of the film concerns Odysseus’ belated realisation that he is complicit in Sinon’s exploitation because he failed to tell him the truth about the Trojan Horse plot. Once he recovers his memory, Odysseus is racked by guilt. The film doesn’t address the moral dilemmas raised by its own narrative invention, such as why it matters so much whether Batman told the whole truth to valiant Robin, given that he would be killed instantly either way – or why the sinless Sinon wants in on the scheme, if the sack of Troy was as bad as the movie wants to suggest. Odysseus’ lie to Sinon doesn’t start the Trojan War, and the Trojans would presumably have taken the horse into the city anyway – as they do in Homer’s Odyssey. This muddled subplot is foisted on the film in order to make Nolan’s relentlessly didactic point about the contemporary Anglophone world: that the lies and xenophobia of the war on terror and Brexit began a cultural decline that is now destroying the values ‘we’ hold most dear.

(https://autoadmit.com/thread.php?thread_id=5886702&forum_id=2#50027446)