I know it was a few pages back but the thing about re-recording dialogue (It's called ADR) is true and not true. With some movies, it has to be done for one reason or another (unavoidably loud locations, special effects machinery, etc), but it is preferable to capture the dialogue on set because the performance is almost always better. Shotgun microphones (The ones they put on the ends of booms) are excellent at isolation from off-axis noise, and with big-budget projects, they are probably working on a sound stage anyways.
In this case, I'm not sure Christian Bale, who is a Method actor, would want to go back and ADR everything, but who knows
Source: I'm trying to do this shit for a living.
Facebook | Twitter | Soundcloud | Bandcamp
Aaron Gray - Stating a Fact [solarSwarm] - OUT NOW! With a remix from JPL! Support from Solarstone, Ferry Corsten, and others!
Also out now - Abdomen Burst ft. Yavanndiel - Solar Eclipse (Aaron Gray Remix)[Solaris]