According to Sam Worthington, the film's star, "We're going to be going back and shooting more scenes for it, they cut loose with some money so we can add to it."
He went on to say, "We're going to be shooting more scenes in January, so we're going to be right up against it -- the movie comes out in March."
Lastly, he added, "There were some creaky parts but they are the parts that we knew were creaky and that we knew were going to be creaky going into it. The studio is also letting us add some gods and scenes. And they're talking about making the movie a 3D film."
While nothing is confirmed about Worthington's last comment in regards to turning Clash of the Titans into a 3D film, with Hollywood currently buzzing about the new technology that was pioneered in James Cameron's Avatar, it could certainly be possible.