Even though it’s been nearly a year since .
The DCEU has a history of incorporating artistic history lessons, like Man of Steel’s depiction if Kryptonian colonialization or Wonder Woman’s story about the origin of the Amazonians, so it’s possible something similar would happen here, tying into the live-action flashback of the invasion we see later.
The big question now, though, is what’s on the wall Diana’s looking at? It’s the only one missing from these particular images, and it’s also the one with the big reveal for this scene. Considering Zack Snyder just recently revealed Batman’s “something darker” line was referring to Darkseid, and we know the Lord of Apokolips was supposed to have a bigger presence in the Snyder Cut, it’s the easiest conclusion to jump to.
If that’s the case, though, that would indicate Darkseid also had a presence at the battle, which wasn’t the case in the theatrical cut. A significant portion of the movie was redone, but on such a CGI heavy scene, removing Darkseid would be no small task, so it could be Steppenwolf, or maybe the Anti-Life equation, which we know originally played a bigger role in that battle.
Source: DC Films Hub