Both Universal and Fox Studios have pulled out of the Halo movie adaptation, citing rising movie costs and concern over the inexperience of first time director Neil Blomkamp. As the budget was rumored to be edging closer to $200 million, and Microsoft getting a lion's share of the profits, the studio execs decided it was time to pull the plug.
Note: This isn't to say the movie still couldn't get made. Jackson is still attached and pre-production continues on the film, although without a studio home it now faces a serious uphill battle.