Wired solicited ideas from Paul W.S. Anderson (hack director of Resident Evil) and Damon Lindelof (hack(?) LOST showrunner).
Anderson's is poorly written and boring and who cares, Lindelof's, on the other hand, is illustrated thusly,
and closes with "Pretty sure we can get a PG-13 as long as no one smokes and when the kid gets shot in the face we do it in a classy way." It's short and enjoyable, I suggest you read it and then join me in wishing it was a real movie.