Sylvester Stallone is turning a more literary page and will direct “Poe,” a film he wrote about the life of Edgar Allan Poe. Robert Downey Jr. is Stallone’s choice for the leading role. Production is scheduled to begin in Europe this fall. The life of the legendary 19th century American poet and short story writer has long fascinated Stallone, who has been nurturing this project for years. He completed the screenplay for the film in 2002, but the project did not come together until this week.