1. Self-aware weirdness. In "Batman v Superman," these superheroes were Serious Business. In "Suicide Squad" they seem to be more about not taking things seriously. Sure, it's probably still very dark humor (I don't know that David Ayer could make a movie that wasn't tinted black). But try imagining somebody in this eyeball mask popping up in "Batman v Superman." You can't!
2. Villains having a drink. Just a bunch of bad guys having fun together killing other bad guys and maybe getting drunk. Almost makes you forget that time the Super Friends couldn't get along at all two weeks ago.
3. Will Smith being Will Smith.
When the Fresh Prince shows up in a summer blockbuster, you can usually count on him to deliver some memorable one liners ("I make these look good," "Now that's what I call a close encounter"), and he did just that in the new "Suicide Squad" trailer after he goads El Diablo into shooting flames out of his hands. "I was just trying to get you there. No hard feelings right? We good." His take on Deadshot feels like Vintage Mike Lowry from "Bad Boys."
4. Batfleck. Fans really enjoyed Ben Affleck as Batman in "Batman v Superman," but the movie dragged him down with its terrible Superman angst and uncomfortably self-righteous vibes. In "Suicide Squad," he's riding on top of the Joker's neon pink car. Pretty good, ahem, contrast.
5. Leto's Joker. This guy has been growing on me, in large part because each trailer shows a new part of what seems like a really goofy wardrobe.