Movie series order

The new Batman and Justice League movies all take place in the same universe. Following them, you would usually go with the release date for a timeline. But I don't think that's accurate this time. If you go by release date order, the movies would be:

Justice League: War
Son of Batman
Batman: Assault On Arkham
Justice League: Throne of Atlantis
Batman vs. Robin
Batman: Bad Blood
Justice League vs. Teen Titans

However, if you think about it, once you throw Damian into the equation, that order doesn't make much sense. Batman is still going solo during Assault on Arkham, then is taking care of Damian during Son of Batman and Batman vs Robin. At the end of Batman vs Robin, Damian goes to stay with the monks, during which time Batman joins with the Justice League for War and Throne of Atlantis. Damian then comes back during Bad Blood, after which he too joins the Justice League and then the Teen Titans in Justice League vs Teen Titans. So the REAL timeline order goes:

Batman: Assault on Arkham
Son of Batman
Batman vs. Robin
Justice League: War
Justice League: Throne of Atlantis
Batman: Bad Blood
Justice League vs Teen Titans