I'm sure the movie will be terrible; not because of how Hollywood normally butchers stuff like this (see: Silent Hill movie), but because of Ghost in the Shell's unique style not appealing to a wide variety of people.
By "unique style," I mean all the talking. I love the series to death, but I'll be the first to admit that there is A LOT of dialogue, with some episodes being nothing but dialogue and discussions. Most episodes had some formula of "first half talking, second half action," and I'm just worried a major movie would cut out most of the dialogue and just make it an action movie.
The only way to really salvage all the dialogue would be to make more of it detective work and less political and existential debates, in order to make the people who aren't familiar with the series happy. Even I, who loves all the dialogue, probably would get bored listening to it for two hours straight, rather than the normal half-hour.