If you scroll almost to the bottom of the page you will see 5 greyed out achievements before it gets to the secret achievements. They are "And the quarterback is toast", "Skywalker Style", "No more lies, old man", "Hot bot", and "Jawa Juicer". If you read the descriptions its almost seems like there might be some episode 4 references in the dlc. I'm sure we will get the full details on all this at comic con.