Remember when there was going to be a Halo movie, with Peter Jackson executive-producing and his hand-picked director Neill Blomkamp at the helm? Most of you probably recall the tangled web that became the aborted film's production cycle, which mostly came down to ballooning budgets and other financial issues, but if you don't, here's the quick synopsis straight from the Wikipedia article.
In 2005, a script for a film adaptation of Halo was written by Alex Garland—which D. B. Weiss and Josh Olson rewrote during 2006—for a 2008 release. The movie was to be developed and released by 20th Century Fox, under the creative oversight of Microsoft. Peter Jackson was slated to be the executive producer, with Neill Blomkamp as director. Before Blomkamp signed on, Guillermo del Toro was in negotiations to direct. The crew has stopped and resumed preproduction of the film several times; while Blomkamp has declared the project dead, Jackson says the film will still be made.
Jackson and Blomkamp didn't part ways when Halo fell apart, though. Instead, they made a long-form version of the short film that got Blomkamp noticed in the first place, Alive in Joberg. The full trailer for that movie, District 9, was just released. So while it's not Halo, it's at least gives you some sense of the combined creative talents that would have brought Master Chief to the screen... or still might, if Jackson is right.
Just for the sake of comparison, here's a link to Alive in Joberg, which apparently impressed Jackson so much in the first place.
Do you think Halo will ever get made? Seems like a toss-up to me, at this point.