I'm predicting Nolan's penchant for crosscutting multiple timelines: Odysseus' journey home is timeline one, flashbacks to the war is timeline two, and what's going on at home with his wife and son is timeline three. Constant cutting back-and-forth until he finally returns home. Also in keeping with Nolan's themes of time, loss, trauma, regret. Odysseus will be sad about lost friends, he'll be pained at the separation from his wife and losing time with his son. Greek mythology is sort of out of left field for Nolan (although he did emphasize Prometheus in
Oppenheimer) but I can see him making it fit in his cinematic universe. Still not wild about the casting, though. If he's going older Odysseus, then I'm assuming Damon is Odysseus and Hathaway is Penelope, but if he's going younger Odysseus, then it'll be Holland as Odysseus and Zendaya as Penelope. Kind of hoping the former, but we'll see.
The real issue is Nolan's never been big on violence. You don't see anything of the home invasion in
Memento and the shooting is very tame in both
Memento and
Insomnia, the Batman films and
Inception are extremely sanitary with PG-13 violence,
Dunkirk is one of the tamest war movies in the modern era. Other than Bale losing his fingers in
The Prestige, Nolan tends to shy away from or gloss over violence. I can't imagine him making this with
Game of Thrones-style violence and bloody, dismembering/disemboweling swordplay. But it'd be fucking AWESOME if Nolan went metal and turned in an R-rated epic