While there have been rumors and discussions circulating about potential new live-action projects, there is no confirmed release date or any official confirmation from Warner Bros. or any other studios about a new live-action Scooby-Doo film.
The last live-action Scooby-Doo film was "Scooby-Doo! The Mystery Begins" (2009) and its sequel, "Scooby-Doo! Curse of the Lake Monster" (2010).
While a new live-action Scooby-Doo film might be in the works, it's important to wait for official confirmation from the studios involved.