I went opening day here in Melbourne, Australia; during a daytime screening, and there weren't many people in attendance. I am planning to go again maybe once or twice before it leaves theatres. I'll try a weekend session, and I bet there'll be more people at one of those.
300 million overseas does sound very optimistic. I'd love it if it came true, but I suspect 200 million international gross is a realistic figure for us to anticipate.