Continuity mistake: When Barry lays flowers at his mother's grave, the base of her tombstone changes style between the close up and when he stands up and runs to his wife. (01:15:25)
Continuity mistake: While fighting Black Manta, Batman stands next to an orange car as he blasts away with his pistols. Between shots, the front seats of this car change from separate seats to a bench seat. (01:01:45)
Continuity mistake: When Flash goes around the decapitated statue of himself in the Flash museum, he stops and you can see a glass door behind him that is broken. The bottom-most part of the break is not to the bottom of the door frame, but a few inches to half a foot away. It then cuts to a view of his feet, and you see the same door behind him. Now the bottom part of the break in the glass is now right at the bottom of the door frame. (00:03:25)
Continuity mistake: Reverse Flash smacks Flash over to the edge of a building. The building is heavily damaged from the war and crumbling. The edge is broken off and jagged, but averages out to a straight line. A few moments later, when Reverse Flash puts his foot on Flash, the broken edge of the building has become much more jagged and uneven. (01:05:40)
Continuity mistake: After Reverse Flash stabs Flash in the leg with the broken rebar, Flash picks up a rock and slams Reverse Flash in the face with it. In the wide shot of this, the rebar is a solid gray bar. It then cuts to a closer shot as Flash grabs it, and suddenly there are screw like lines swirling around it. (01:04:45)
Continuity mistake: Reverse Flash stabs Flash in the leg with a broken rebar. In the side shot, Flash throws his head back. It cuts to a close up of Flash, and he throws his head back again and screams. It cuts several times between a close up and a side shot at this point. In the side shots, Flash has his lips open, but gritting his teeth hard. In the close ups, Flash's mouth is wide open. (01:04:40)
Continuity mistake: As Superman is escorting Reverse Flash down the steps of the museum, you can see the top part of Reverse Flash's red lighting symbol over lying the black circle and extending up into the yellow of his suit a few inches. It then cuts to a different angle and the tip of it is barely a few millimeters above the black circle. Also between shots, the bottom yellow triangle part below the S on Superman's chest suddenly gets much larger. (00:11:10)
Continuity mistake: Just before Aquaman can stab Cyborg's heart, Superman cuts off his arm with laser vision and it falls to the ground beside him with the trident. A little later when Cyborg dies and Superman is kneeling beside him, it cuts to a wide angle. Aquaman's arm and trident are nowhere to be seen. It was not blown away by Superman's breath either. (01:09:50)
Continuity mistake: Reverse Flash knocks Flash back and he is next to the edge of a building, his arm hanging over the side. Flash sees Grifter get killed and tries to get up, but Reverse Flash presses him back down with his foot. Flash is still right next to the edge of the destroyed building. The Reverse Flash zooms around behind Flash, and suddenly there is at least a good 2 feet between Flash and the edge. Moments later, Reverse Flash kicks Flash and he goes over to the edge again. (01:05:40)
Continuity mistake: After the car falls on Batman, Grifter begins shooting at Black Manta. He is standing on top of a yellow car. When Black Manta begins shooting heat vision at him, the car turns green. (01:02:05)
Continuity mistake: While Batman is fighting Black Manta, he dives over as the bad guy blows a car into the air. The car is a light blue color and falls over on Batman. The next shot as Black Manta is walking towards it, the car has turned to a light orange color. Moments later when Batman crawls out of that car, it is back to being light blue. The car it lies on also changes from purple to orange. (01:02:00)
Continuity mistake: After crushing the skull of an Amazon, Black Manta who shoots concentrated heat vision turns his attention to Batman. There is a purple car beside him. A couple shots later before he blasts at Batman, the car has turned black, and moved a lot further away from him. (01:01:35)
Continuity mistake: While fighting in the building, Wonder Woman gets up from some rubble and throws Aquaman through a wall leaving a hole. She then chases after him and they talk for a moment before suddenly Flash comes in and starts pounding on Aquaman. Cyborg then blasts Wonder Woman backwards. She flies at the very same wall, but now there's no hole and she makes a new one going through it. You can tell that it is the same wall as when she and Aquaman went through it the first time, her back was to the wall. She never changed positions or location at all until Cyborg comes in, and he blasts her straight backwards. (01:00:35)
Continuity mistake: After Wonder Woman smashes Aquaman through a wall into a building, he elbow drops onto her and then smashes her face into the floor, leaving a hole. The it cuts to a wide angle and he picks her up to throw her. The hole left behind from her face is now gone. (00:59:55)
Continuity mistake: At the meteor crater in Metropolis, Flash and Batman are standing very close to the edge of the roof of a building. A few shots later, they are about twice as far from the edge. And then there is suddenly enough room for Cyborg to land between them and the edge, and Flash be able to take a few steps forward towards Cyborg. (00:46:15)
Continuity mistake: After Barry wakes up in bandages with third degree burns all over him, there is a spot of blood on his chest below his left shoulder. A good amount of the blood stain overlaps a line dividing two strands of the bandage. Moments later when he sits up, the blood is barely above that line at all. Later when Barry is sitting in the chair again, that same stain has completely changed shape. Other patches of blood on him also change. (00:36:20 - 00:38:00)
Continuity mistake: Barry is looking at a picture of the Wayne family before Batman punches him away. Barry is knocked to the left towards a bed. The photo was positioned so it was facing to the right. A few shots later when Batman is holding Barry by his collar, the angle shows them by the bed and the camera is behind the table the photo was on. But the photo is facing the camera. At this position of the camera and photo compared to previously when Batman punched Barry, the photo should have been facing away from the camera. (00:20:40 - 00:21:20)
Continuity mistake: In the Batcave, Batman gets off a good punch to the side of Barry's head and knocks him over to a medical bed. There are two wine bottles on the floor next to the bed. A couple shots later when Batman is walking up to him, the beer bottles have vanished. (00:20:55)
Continuity mistake: As Barry is in the Batcave, he looks at a gun in a case and says "What happened to you, Bruce? You were the James Bond of superheroes." The camera pans over to a picture frame and you can see behind it there is a beer bottle. But a couple shots later from a different angle, the beer bottle suddenly changes positions behind the photo. (00:20:40)
Continuity mistake: After the guy wakes Barry up and hands him some coffee, he says he doesn't mean to interrupt Barry's beauty sleep, and Lord knows he needs it. In the middle of this sentence, Barry is holding the cup close to his face, but stops short of taking a drink and looks up at the guy who handed it to him. It then cuts to a close up and suddenly Barry has the cup to his mouth taking a drink. (00:12:20)
Chosen answer: Despite the ending in Flashpoint to indicate a Darkseid invasion, War is not a sequel. It's a reboot. While both films were part of the DC Universe Animated Original Movies series, War is the first movie of the series that is now part of the DC Animated Movie Universe. This is also why the voice actors are different.
Bishop73