Luthor flashes back to Ghost in the Machine (1997) to when Brainiac got into his computer and he allied with him, but it shows Brainiac firing a yellow beam at him rather than a blue beam as he actually did on the show.
When Green Lantern is attacked to be captured, he retreats toward the empty street, but a new angle shows him backing near where Amanda Waller has appeared where she was not a moment before.
On The Flash's third punch, the Luthor-Brainiac hybrid rolls on the ground, where he is suddenly in the opposite position he should be in, with the switch-free arm to the right instead of the left.
While considering Luthor's next move with Shayera, Wonder Woman is to Shayera's left, with Superman almost off-screen, to their right, then he is shown to the right of Flash and J'onn. But the next, distant shot show J'onn and Flash to the right of Green Lantern, Shayera, Wonder Woman, and Superman. After Batman tries to reason with them about Brainiac's power, another view shows Wonder Woman to the left of Superman.
When J'onn contacts the Watchtower, Superman is on his left and, since he's about as tall as J'onn, on an area level with his, but then is shown behind and on a higher level than him, since he has to lower his head in order to get close enough to hear what J'onn is hearing.