The actor and musician captioned the image with the name of his band 30 Seconds To Mars' new album Walk On Water.
Warner Bros and DC announced the project, with Todd Phillips, Scott Silver and Martin Scorsese already on board.
Linkin Park has also spoken out about the singer's death for the first time in an open letter.
Leto also talks about his upcoming movie Blade Runner 2049.
Star Wars actor also explained what encouraged him to return to Denis Villeneuve's sci-fi sequel.
Sony Motion Picture Group chairman Tom Rothman unveiled the sneak peek alongside star Ryan Gosling.
Unconfirmed reports have surfaced suggesting Jolie and Leto are dating.
Rumours suggest that Leto and Jolie hooked up after the actress filed for divorce in September 2016.
From Oscar-nominated turn in Little Women to darker, more complex roles in Girl, Interrupted and Black Swan.
The movie is expected to release by 6 October, 2017.
'There's so much that we shot that's not in the film,' says Jared Leto.
A handful of good performances can't overcome messy plotting, an obnoxious soundtrack and terrible villains.
A psychiatrist-turned-psycho and the clown prince of crime in blockbuster are explained...
Suicide Squad premiered at a star-studded event in New York on 1 August.
Harley Quinn actress reveals hardcore behind-the-scenes preparation on The Tonight Show.
Ben Affleck will co-write the solo Batman movie with DC's Entertainment president Geoff Johns.
IBTimes UK film critic Amy West takes a look at the big movie releases for this month.
The movie opens in theatres on 5 August.
To prepare himself for the role, Leto watched violent crime videos to understand the maniacal character.
The 48-year-old claimed that the Joker/Robin rumour was the most absurd he's heard of the movie yet.
The movie releases on 5 August 2016.
Warner Bros teases fans with brand new snippets of Suicide Squad featuring Task Force X at SDCC.