Seems there was a bit of controversy about this too, since it was originally leaked from Comic-Con and not planned to be released yet.
From the reddit thread
The statement they released on Facebook:
"Warner Bros. Pictures and our anti-piracy team have worked tirelessly over the last 48 hours to contain the Suicide Squad footage that was pirated from Hall H on Saturday.
We have been unable to achieve that goal.
Today we will release the same footage that has been illegally circulating on the web, in the form it was created and high quality with which it was intended to be enjoyed.
We regret this decision as it was our intention to keep the footage as a unique experience for the Comic Con crowd, but we cannot continue to allow the film to be represented by the poor quality of the pirated footage stolen from our presentation."
Sue Kroll, President Worldwide Marketing and International Distribution, Warner Bros. Pictures
Same thing happened with the Deadpool trailer, but apparently it's still a few weeks away from a real release:
Also, some info on the Suicide Squad members: