According to Cinemablend, a source close to the Suicide Squad production tells them that Joe Manganiello (Magic Mike, True Blood) is close to nabbing up the part of Deathstroke in the film.
But the deal isn’t officially done, because Jason Clarke’s (Dawn of the Planet of the Apes, Zero Dark Thirty) name is still in the mix, but their source says it is an almost certainty that Manganiello will be Deathstroke.
Cinemablend also points out that the other reason of the likelihood of this casting, is because of the fact Manganiello has worked with Suicide Squad director David Ayer, in his previous film Sabotage in 2014.
The truth is Joe Manganiello has been fan cast so much as of lately in the DC Cinematic Universe, that we’ll have to take this report with a grain of salt until it’s officially announced.
Umberto Gonzalez of Latino-Review adds more to the rumor.
#DEATHSTROKE IN #SUICIDESQUAD! Deathstroke works with/for #ONSLAUGHT & does their dirty work. He's a hired assassin and he doesn't have any powers like in the comic book. They're going for a pre-super villain Deathstroke. He's a huge part of both of the major set pieces of the film. His introduction is INSANE! He's badass & almost takes the team down on one mission single handed. Deathstroke has THE breakout & choicest role in the film. The running gun battle that sources are describing is something else. His suit is very stealth oriented. They used an actual US military tactical outfit for the basis. He's armed to the teeth, uses a sword and automatics. In concept artwork he has two eyes. The mask is there and it's the iconic one. Rumor about Jason Clarke still in play is not true because he originally got offered Deathstroke months ago but has a scheduling conflict with Marc Foster's' 'All I See Is You.' Joel Kinnaman originally tested for the role as well but got Rick Flagg instead. Joe Manganiello has a scheduling conflict with Ryan Murphy's 'Scream Queens' BUT HE JUST DROPPED OUT! What does that mean? Deathstroke is 'probably' his.