Allan Heinberg is being brought in to write the Mr.
This reads as a confidence signal, a studio backing its vision with proven creative talent. The actual signal is much darker.
Heinberg's resumé tells the story. He arrived at Wonder Woman after Patty Jenkins had already locked the film's direction, joined Marvel Knights television after the initial creative team departed. Was brought onto the Aquaman script after the first draft failed to satisfy Warner Bros. In each case, he was the solution to a problem the studio couldn't solve with its original architects.
When a studio hires a script doctor, it's not placing a bet on the franchise's future—it's accepting that the original vision doesn't work and hoping a new voice can salvage the pieces. The press release says "Heinberg joins the project." What it means is "we fired everyone else's ideas." The Supergirl post-production troubles that preceded this announcement matter precisely because they establish the context.
Heinberg is genuinely talented—Wonder Woman succeeded because he understood how to preserve what worked while rebuilding what didn't. But his presence here isn't a signal of the Superman universe's health. It's an acknowledgment that the original Mr. Terrific vision failed to convince the people spending the money. The studio is gambling that one good writer can fix what the last three couldn't.