For movie purposes though, a Darkseid invasion story could work, but there would need to be a lot more backstory into Apokalypse and Darkseid. In fact, a variation on the Final Crisis story could work quite nicely as a film--maybe with Cyborg developing a wish machine of some sort.
If I were developing a Justice League
movie with Darkseid as the villain, I'd plunder Jim Starlin and Mike Mignola's Cosmic Odyssey
for the source material. It's not, technically, a Justice League story, but I think it could easily be made into one -- and at the end, the heroes decide to stay together as a team.