I think a movie would be cool. I've been DYING to know how "Master Chief" got that wacky nickname. But there's a danger too. What if Jones and the fellows did a "George Lucas" and started reinventing their universe because they didn't like it anymore?
Just think, what if it turned out Master Chief wasn't a Spartan? Because Spartans are too violent! In this Halo re-imagining, Master Chief would be a thoughtful environmentalist, on a quest to save a rare and fragile orchid from extinction – through non-violent political means. Instead of being called Halo: The Movie, it would be called, FlowerBoy: A Horticultural Hero.
And if Hollywood got a hold of it, they'd Hollywoodify it! By casting a teen heartthrob! Freddie Prinze Jnr.! As Master Chief! That way you can secure the lucrative Cootie demographic. And since Prinze is such a dreamboat Jnr., the Chief's helmet would have a huge, open, peekaboo faceplate so you can see how pretty Prinze is!
And a movie with no love interest is no movie at all. I suggest Kathy Bates as Cortana, older, wiser, more mature and perhaps more skilled in the ways of intergalactic love. Kind of a Mrs. Robinson thing.
And the soundtrack! Tunes from the hippest teen bands, with the title song, "Get Yo Flower On" by Beyonce, featuring Jay Z.