I understood it more after the first trailer. Even after the second. However, at this point, when basically everyone who has seen it is saying it's good I'm inclined to believe them.
And it's not a DC exclusive thing, mind you. We go through this song and dance with different blockbusters and it never makes sense to me. If you want to be excited for a movie, then dismissing it every time someone tries to give you a reason to be excited seems counterproductive. But then, I find so much about the culture surrounding these movies to be strange. So maybe I'm just never gonna get it.
Having not seen the movie, it does feel like a Suicide Squad situation: a regular ass bad movie that's labeled an abomination by the hardcores, but general audiences still dig it for whatever charm it has or whatever it does right. I probably won't see it till it hits Netflix, but I'm not at all shocked to see it doing so well. Sounds like a fun watch.