Firstly, there’s an article looking at the recent spate of video game adaptations here which goes into some details about the Halo project, here are some quotes from Peter Jackson and Microsoft representatives that are in the article:
“My goal is not just to make ‘Halo the Movie’ a great film adaptation of a great game,” he says. “I really want it to be a great science-fiction action film. I want it to be a great movie in its own right.” […] “We realize there’s not a great track record there,” he says. “That’s why it was so important to partner with somebody like Peter Jackson. It’s about as close to a guarantee as we could get that this is going to be a high-quality movie with high-production values and good storytelling.” […] “For me, the Master Chief is like the Clint Eastwood — Dirty Harry — was for us when we were growing up,” Lee says. “He could potentially be that for the kids growing up today.”
Rumours do continue to fly, but a nice one is the possibility of some Halo Movie content appearing as a bonus with Halo 3 (in the legendary pack maybe?). Maybe some conceptual artwork; with production on hold we shouldn’t really hope for much more. Many sites are claiming teaster trailers et al, but I think that’s a bit much to expect. People have also reported to me rumours of Microsoft waiting for Marvel to develop their own film studio as they have tie ins with the Halo graphic novel. However I think this is just speculation and such a wait would impose significant delays.
Finally, here is a very nicely FAN made trailer that pulls together a lot of Halo 3, Halo Wars, Halo 2 and random tid-bits to create an interesting picture of what the Halo Movie could achieve.