So, what's the recent hold-up on the Halo movie production?

I checked imdb's website a few months ago, and I'm sure the scheduled
release was 2012. I go to check the movie's status today, and now the
scheduled year is (????). What's with all the delay? The only reason
I could find is that Microsoft doesn't want the movie to give the
franchise a bad rep, which is understandable. But I don't see that
happening when Peter Jackson is in charge of pretty much everything.

Has anyone heard any news as to why this movie is delayed again?