First of all, lets look at the cast.
Jared Leto- Joker.
He will actually be quite good I think so we won't talk about him that much.
Will Smith- Deadshot
Again he will be good.
Margot Robbie- Harley Quinn
She is a good actor, although I think they made the wrong decision. She's not the right person and I'm not a huge fan of her costume.
Jai Courtney- Captain Boomerang.
To be honest I don't think he'll be awful but he won't be great either.
Cara Delvingne- Enchantress
Adewale Akinnuoye-Agbaje (If I spelt that wrong I'm sorry)- Killer Croc
At first I was thinking, OH HELL NO!, But he is growing on me and I think he will be good.
Some of them I haven't done but I don't know alot about them.
Also BatFleck will be great.