I think the film bombed more because of disinterest perhaps in the source material, familiarity of the visuals story etc. "Whitewashing" had little if any impact on the films poor performance in my opinion.
The film probably would not have been made without a major Hollywood star attached.
Pretty much how I spelled it out in my post from March 23rd:
Like I pointed out earlier, this is one of those movies that appeals to a much smaller niche of moviegoers. Odds are the general public has never watched Ghost in the Shell and probably has never HEARD of it. So it's already sitting on one strike possibly 2. The only reason they opted for Miss Johansson was solely to hope they can attract the general masses. Had it been some no name, this thing would be a guaranteed bomb. With her, they have a smidgen of hope that it can break even (or perfects make a nice profit) at the box office.
Yeah, they're kind of in a corner. It's not like there's a plethora of bankable Asian actresses