Someone needs to make this happen
So the Guillermo Del Toro has been talking to Peter Jackson and Bungie about helming the Halo movie. Seems like what it comes down to is scheduling (and probably a bigger wad of cash). Del Toro is doing Hellboy 2 no matter what. Whether or not he does Halo seems to hinge on whether or not he'll have the time to direct it after finishing Hellboy 2.