>>It's just a movie based on a historical event.
Even worse: a movie based on a *comic book* loosely based on a historical event.
actually it is fairly historically accurate in its plot.
Visually it may have taken liberties but the plotline and the historical points are dead on.
For confirmation goto http://www.themoviespoiler.com
It has a text synopisis sans visuals.
It is a VERY good movie.