The new trailer for Suicide Squad shows us lots of action, characters and lots more Jared Leto as the clown prince of crime himself. But with all the stuff the trailer shows us there is lots of other stuff it doesn't mainly who is going to be the main villain. Since the Comic-Con trailer people have been saying that either The Joker (Jared Leto) or Enchantress (Cara Delevingne) would be the villain and the person that the squad would have to go after. I know that Enchantress was part of the Suicide Squad in the comics but the movie doesn't have to be the same as the comics.
Now with the new trailer we see some kind of thing in the subway which looks to be the villain due to the fact that he looks magic and the things that Deadshot (Will Smith) is shooting at look like they have been possessed in some way.
With all the leaked set photos we saw one of a tattooed man who in the comics is perfectly named The Tattooed Man (Common). In the comics he is a super-villain who can manipulate living tattoos on his body.
The new trailer does show someone in the subway destroying a train with what looks to be magic.
However he isn't the only person people have thought it to be, some people have said that it could be Swamp Thing but that green glow doesn't look like any plant.