This one has been rumoured for ages ... from the Hollywood Reporter:

Screenwriting hero Lawrence Kasdan has been tapped to pen "Clash of the Titans" for Warner Bros. Pictures. Basil Iwanyk is producing via Thunder Road.

A remake of the 1981 cult classic, the story revolves around Zeus' son, Perseus, and his journey to save Princess Andromeda during which he must complete various tasks set out by Zeus, including capturing Pegasus and slaying Medusa. The original marked the final film on which Ray Harryhausen did special effects.

Travis Beacham ("Killing on Carnival Row") wrote a draft.

Lynn Harris is overseeing for the studio.

For Kasdan, "Titans" is his first fantasy-style project since the early 1980s, when he wrote the screenplays for "Return of the Jedi," "The Empire Strikes Back" and "Raiders of the Lost Ark." He has since tended to write, as well as direct and produce, more earthbound fare such as "Mumford" and "Grand Canyon." He next exec produces the upcoming "In the Land of Women," written and directed by son Jon Kasdan, which bows Friday.