When does the mark of Athena come out as a movie?

As of now, there has been no official announcement regarding a movie adaptation of "The Mark of Athena," which is the third book in Rick Riordan's "Heroes of Olympus" series. Fans of the series continue to hope for adaptations of Riordan's works, but any release dates or plans for a film remain unconfirmed. Keep an eye on news from the author or production companies for any updates.