"This trailer nailed the tone and intention of the film I made. Methodical. Layered. Complex, beautiful and sad." -David Ayer (longer quote & link in comments.) Thought it'd be worth a revisit after that statement.
"The pic has the tajuk of The Suicide Squad and is not being labeled a direct sequel but as a relaunch. The 2016 original movie featured the characters Deadshot, Harley Quinn, the Joker, Captain Boomerang and Killer Croc, who are forced into the service of the government in exchange for lighter prison sentences.
Sources say that Gunn’s focus is to take the franchise in a new direction with a mostly all-new cast of characters and actors. Sources also say that the project is also very much rooted in Gunn’s vibe, as seen in the Guardians movies."