You know what companies like bungie does when you get 50,000 people to sign a petition? They delete it. They dont care what the fans want, if they feel like making the movie, they will, if not, they will take their good old time.
If you really want to have a real petition, send in halo related stuff, people sent in some sort of cereal when some show on NBC was canceled, months later, they came out with new episodes after millions of people sent in boxes of the cereal to the producers. Do the same, but with halo stuff and to bungie.