Walt Disney Pictures bought the billboard located at Santa Monica/Westwood in Los Angeles for an entire year. Beginning in mid-December, the studio has been updating the location with new Tron Legacy advertisements, at the rate of one every month and a half or so. And it was revealed they will keep doing so up until the release of the film in December 2010.
Today the fourth billboard in the series was released on Yahoo, which you can see in full after the jump. It features the new four-wheel off road light-car (or whatever they end up calling it), one of the new vehicles introduced in the sequel. Since the billboards seem to be telling a story thus far, I’ve also included the first three billboard images below.
Billboard #4: NEW