Ummm...meh. I try to like anything with Batman in it, but DC sure doesn't make it easy. I'll try not to do any spoilers, but there really isn't much to spoil. This movie didn't get, grab, or hold my attention in any way. All the characters pretty much had zero personality and nothing charming or appealing to me at all. And... grumpy Aquaman with a chip on his shoulder drinking whiskey and mad at the world? Well, he has nice abs so all the women give this movie a thumbs up I guess. The plot is...boom! Para demons! No explanation, no storyline leading up to them, why or how they're there or what they want... It's like walking into a movie 1/2 hour late. And then...I felt there should have been a lot more heroes for a JL movie, at LEAST Green Lantern and Hawkman. Especially since there wasn't that much appealing about the characters they did have. And then the character that shows up about half way through, about as much appeal and personality as a rock. It was so exciting I kept dozing off, if that says anything.
If you want to see another directionless movie with some super heroes in it, this may work for you. It doesn't do much for me. Glad I saw it on my firestick, and not spend money to see it in a theatre. I'd much higher recommend seeing "Batman and Robin: Return of the Caped Crusaders" animated movie with Adam West and Burt Ward, time much better spent for sure.