Bigger than THE INFINITY GAUNTLET! More cosmic than ANNIHILATION! Since the end of SECRET INVASION, the CHAOS KING has amassed his army of alien slave gods — and the time to strike Earth is NOW! Only the greatest Marvel heroes can oppose him – all led by the newly-returned god of heroes- HERCULES! But are even his incredible new powers enough to stand against the greatest threat the Marvel Universe has ever seen – a mad god who seeks to destroy Reality itself?
Chaos War 1 (the backup story at the end “I Was Legend”)
Prince of Power 1-4
Chaos War: Chaos King 1
Chaos War 1-3
Chaos War: Thor 1-2
Chaos War: God Squad 1
Chaos War 4
Chaos War: Alpha Flight 1
Chaos War: Dead Avengers 1-3
Incredible Hulks 618-620
Chaos War 5
Incredible Hulks 621-622
Chaos War: Ares 1
Chaos War: X-Men 1-2
You could put Ares before Chaos War #3 but I think it messes with the pacing. X-men is pretty much its own story and none of them show up in the main Chaos War series.