For those that are interested it appears that all of the movies currently considered part of the DC Animated Movie Universe are on HBO Max. Here’s the list I have - let me know if there are any errors:
- Justice League: The Flashpoint Paradox
- Justice League: War
- Son of Batman
- Justice League: Throne of Atlantis
- Batman vs. Robin
- Batman: Bad Blood
- Justice League vs. Teen Titans
- Justice League Dark
- Teen Titans: The Judas Contract
- Suicide Squad: Hell to Pay
- Constantine: City of Demons
- The Death of Superman
- The Reign of Supermen
- Batman Hush
- Wonder Woman: Bloodlines
- Justice League Dark: Apokolips War
In addition to those they have a lot of other animated DC movies - all of them since 2007 except for ‘Green Lantern: Emerald Knights’ and ‘Batman: The Killing Joke’. All told there are 40 animated movies on there - enough to watch a different one every weekday for two months!