DOOM Scriptwriter "explains"

Dave Callaham explains that it's all hollywood's fault that his movie script has little to do with even the flimsy DOOM backstory. Seems a bit shifty to me - trying to explain that we shouldn't worry because the film will have all the important elements of the DOOM plot (aside from backgroud, characters, plot or monsters??)

Hollywood must be pretty messed up then. Like I posted on EvilAvatar.com - set in mars, have some teleportation stuff get messed up and star Bruce Campbell. Jeebus, how hard can this be?