Helmer to develop, possibly direct, Leo DiCaprio pic

Oliver Stone is doing some investigating for 20th Century Fox.

Director, who helmed Fox’s upcoming “Wall Street: Money Never Sleeps,” is coming aboard to develop and possibly direct “Travis McGee,” based on the fictional detective created by American author John D. MacDonald.

Leonardo DiCaprio was already set to star as the scrappy detective, a self-described beach bum who resides on a houseboat in Florida, taking on random cases.

Peter Chernin’s Fox-based Chernin Entertainment is attached to produce with Amy Robinson and Appian Way’s DiCaprio and Jennifer Davisson Killoran.

Film would take its storyline from the first of MacDonald’s 21 books, “The Deep Blue Goodbye,” which has the detective searching for a World War II treasure. Adapted script was penned by Dana Stevens.

Stone’s “Wall Street” sequel is likely to make its world premiere at the Cannes Film Festival. In light of that opportunity, Fox decided to push back the release of “Wall Street” from April 12 to Sept. 24.

Follow @Variety on Twitter for breaking news, reviews and more