Now I realize this post may be a bit late considering how long ago the trailer was released but with batman vs superman being released I think we need to think about this movie since it's only a few months away. Now it's been awhile since I saw the trailer so im not sure if they show the guys face but at the end of the 2nd suicide squad trailer we see the joker say in a horrific way "Im not going to kill you.... Im just gonna hurt you really really bad." and here is who I think he's possibly talking to.
Now while batman vs superman did emply that robin might have died and an interview with Zack Snyder saying how and when robin died I think that suicide squad might take place before those event's and might tell us how he died I dont really believe that jason is dead what I think it is is dick grayson's suit and the joker was teasing batman. Another thing I think will happen is during the events of suicide squad we might see the joker kill jason and then maybe use a red hood story line for ben afflecks solo batman film or any other future batman films.