They would be better off doing it as a "series of miniseries"; I'd start off with the original Metal Gear, then progress to 2, then Solid and so on. Maybe do the ones with Big Boss (Outside of the numbered ones) in-between or something.A movie, even if pushed to 3 hours would still have to be super watered down to fit everything. A series could be really cool....but with so much in the Metal Gear world, where do you even start?
I do like the MGS3 feel in the 60s, things not as complex as the later games. But not sure that would transition to a show as well.
MGS is NOT a story you tell in one movie.