Rovio just released an Angry Birds Star Wars prequel teaser. While Angry Birds Star Wars is available for free download for the next week (iPad and iPhone), they have been saying things like "Big new game announcement coming on Monday! #July15." via twitter.
They also released the following image seen above. Remember that imagery from Star Wars Episode 1? The guess on the street is that Rovio may be releasing a Star Wars prequel based off of Star Wars (Episode 1 to Episode 3). Time will tell.