I will quote this story from Ethan Anderton at Firstshowing.net simply and without comment:
After having his name thrust into controversy and new facets of our pop culture with Dan Brown's book The Da Vinci Code, historical icon, painter and inventor Leonardo Da Vinci will be getting quite the fictional makeover as The Hollywood Reporter's Heat Vision reports that Warner Bros has picked up a treatment entitled Leonardo Da Vinci and the Soldiers of Forever, which re-imagines Da Vinci as a member of a secret society who falls headlong into a supernatural adventure that pits the man against Biblical demons in a story involving secret codes, lost civilizations, hidden fortresses and fallen angels. So Da Vinci is the new Indiana Jones? Read on!
The trade describes the film as National Treasure and Raiders of the Lost Ark by way of Clash of the Titans...
Hollywood Reporter also sez:
In the wake of the worldwide success of "Sherlock Holmes," Warners seems eager to make more projects involving a period setting, a historical figure and the fantastical. Last week, the studio picked up a pitch that has Francis Lawrence attached to direct a supernatural tale featuring explorer Marco Polo, and it's back in business with "Holmes" director Guy Ritchie on a King Arthur project.