Maybe it's me but the only one that say's 'dc universe' to me is Harley Quinn, she at least seems to have the right vibe (the 'smile' especially).
Deadshot, he's got the wrong eye covered (even I know this and I'm no expert) in that promo, the least they can do is get the eye right. He also has a more deathstroke vibe than deadshot to me too. Still not sold on Will Smith either.
El diablo just seems like a normal gang banger from 'Mexico'...
I know they don't want to copy the comics but you know part of the reason people like the comics is the styling and I'm not sure they've hit this right, they seem a bit too 'dark'. Doesn't help with arrow/flash being out either.
I'm still curious about it, I grew up more with DC than Marvel, (Margot Robbie doesn't hurt either) but I'm not expecting the best outcome based on this image...