Trivia: The black and red check jacket that Henry Cavill wears when he's talking to Ben Affleck on the farm at the end of the movie is near-identical to the one worn by Clark Kent in the original 1978 Superman movie, when he's telling his mother he has to leave.
Trivia: After a family tragedy, coupled with studio executives' dissatisfaction with the production, Zack Snyder left the film and was replaced by Joss Whedon, who rewrote and re-shot large portions of the movie. After several years of fans demanding an "original" cut, HBO Max funded Zack Snyder's Justice League, restoring the director's original vision for the film, which garnered mostly positive reviews, being largely viewed as an improvement on Whedon's version.
Trivia: In Justice League, Jason Momoa has one line of Icelandic. His pronunciation was so atrocious that when shown in Iceland, which normally subtitles English-language movies, the Icelandic also had to be subtitled...into Icelandic, just so people could understand what he said.
Trivia: In a nod to the prior film adaptations, composer Danny Elfman included several musical cues that included elements of his compositions from the original Tim Burton "Batman" and John William's iconic "Superman" theme.
Trivia: Slade Wilson is played by Joe Manganiello - he also took the role of Flash Thompson in Sam Raimi's Spider-Man trilogy.
Trivia: In the battle against Steppenwolf with the Amazons and the Atlantic people, Green Lantern is visible at least twice. Zeus, father of Diana, is also seen.
Answer: "Surely they'd figure it out" is hardly a suitable solution. If they knew how to destroy them, they would have. They did the next best thing by hiding them in different places.