The Los Angeles Times reports that "Spider-Man" franchise producer Laura Ziskin said the fourth installment is tentatively scheduled to hit theaters in May 2011.
Already scheduled for the month of May that year are Marvel's own The First Avenger: Captain America on the 6th and Harry Potter and the Deathly Hallows: Part II.
Ziskin added that the screenplay is not finished yet, but that she and Sony Pictures were hopeful Spider-Man 4 could be ready in three years' time.
Neither star Tobey Maguire nor director Sam Raimi is yet committed to work on the next installment, but Sony has paid Marvel to renew its rights.
Special thanks to Spider-Man Hype/Superhero Hype for the heads up and Los Angeles Times for the article!