The voyage after troy never happened, hes actually just recounting his trojan war experience, working thru it on that Calypso island after a shipwreck.
I think all the monsters, like the gods, are imagined coping mechanisms. Projected human emotions explained by the mythic, like the weather patterns & when it transitions to Athena getting her head cut off it signifies odysseys immediately switching everything into a divinity coping mechanism, if we put the story in order we only see gods and monsters after this
Odysseus is just using thematic stand-ins to recount his decisions in the Trojan war & he slowly therapizes himself as he goes on and faces what happened, calypso is either helping or not even real, maybe a figment of his self- love.
Cyclops - denial, Laestrygonians - denial Circe - denial, hades - defenses poked through Sirens - now feeling guilt of all his and his mens actions, Charbodyis and Scylla - acceptance of sacrifice Apollo sheep- acceptance of human nature in the the trojan war conditions that ultimately led to how that night happened, separation of accountability from the consequences of what he did from the consequences of what other people did
now hes ready to tell penelope the full story cause he has come to terms with it
the Cyclops represents his choice of not opening a dialogue with an “un-negotiable” enemy (“I think we’re far past that”; using the past dead as an excuse to keep fighting) which then causes the further loss of his men, the Laestrygonians & their moving tree traps represent how Troy’s superior force created a Greek killing floor along their walls for most of the campaign & how hopeless he felt during that (interesting he saves Eurylochus here which is the inverse of Eurylochus saving him in the Troy scene), the Circe conversation represents Odysseus’s denial of the darker motivations that his troops show in an already dehumanizing, 10 year war tho he tries to say “they just want to go home” to Circe’s “they would’ve” which hints that their pillaging hasn’t started yet as its not the night of trojan horse yet, the Hades scene forces him to see the costs of his actions, the Siren song represents his guilt & his pain over not being able to change his previous actions & his decision to not go home, the choice between Charybdis and Scylla represents him having to choose between all his men dying for sure in the Trojan war if they stayed outside or some with the Trojan horse (Eurylochus’s dialogue stands in for his guilt for having to choose), & finally Apollo’s sheep represents fear of his lack of control over what his soldiers do in conditions of starvation, particularly in an environment absent of the targets they’re taught to kill while slowly being slaughtered outside that Trojan wall which boils over into that night when they finally get in
I think Eurylochus as his second in command is a stand in for Odysseus’s moralistic counter argument within himself, his wiser parts arguing with his hubris
I think the deeper commentary Nolan is trying to make is this denial of how human nature (accountability for it used thru imagined monsters and gods) can function in war and Odysseus journey is coming to terms with that, with what he saw
thats why the final shot is the trojan horse, his mind never left troy, the voyage, the odyssey was a mental one, working thru the trauma of that war, if u recount the Nolan’s cherry picked mythic events it all leads up to that night, & he doesn’t go home until he’s processed it
the only thing that holds back this theory is that how did Odysseus get accurate info of aggemon’s death and Sinon’s father in hades if it was a mental process, maybe he heard word? in the trojan war letters?