Are...are you kidding? This literally ONLY means he's working on a script draft. Remember when Jeff Wadlow posted all that X-Force art indicating his version of the movie? Remember how Fox eventually let him go?
Remember all that Neil Blonkamp Alien 5 concept art? Remember how that movie got cancelled after?
Remember how Josh Boone posted New Mutants art like more than a year ago, and that still doesn't have a film date locked down?
Want me to keep going?
I mean hey, Justin Kroll is a reporter for literally the most reliable trade on the planet, but hey, David Ayer tweeted a comic picture. Sure, we know that The Batman's done casting and costume tests and still doesn't even have a ballpark filming date, but hey. David Ayer Googled an image of Black Mask so surely this is filming any day now.