The Bleat has an excellent hypothetical exchange between the Doom movie scriptwriter and a Hollywood producer:

Producer: Of the game, maybe, but you know, we’re in the reimagining business here. Value added. People go see this expecting demons from hell, we give them something else, shake them up.

Writer: But they don’t want anything else. They want demons from hell. They want imps throwing balls of fire and giant horned creatures with cloven hooves and floating beasts and flaming skulls.

Thanks for the heads-up to Eric Trautmann. Here's hoping Halo gets a little less reimagination.