On September 29, 2016 Zack Snyder, director of the DCEU's Justice League, sent out a cryptic Tweet that sent the hearts of DC fans, well, atwitter. The image appears to show Snyder working on a piece storyboard art wearing a Batman gauntlet. This type of visual tease is not uncommon in the social media age in Hollywood and DC's movie chief, Geoff Johns, has used the tactic brilliantly to promote upcoming events for years. Snyder's original Tweet is pictured below.
DC Extended Universe then worked some photoshop wizardry on Snyder's image to enhance the storyboard image and Tweeted it as shown below.
A closeup of the storyboard appears to show a meeting between Deathstroke and what I can only assume is Lex Luthor, due to the bald head and bucket of Champagne. This scene could show a meeting between Lex and Slade to negotiate a contract to assassinate Batman, thus setting up The Batman. Whatever it actually shows, I can't wait for it.