The great thing about franchises (besides the numerous sequels that can be spawned) is the fan following. And Resident Evil has its share of fanatic enthusiasts, who are responsible for the staggering $700 million (almost) that the makers have managed to rake in so far.
Some statistics: Resident Evil: Retribution is the fifth movie of the series that is based loosely on the Capcom game, the second one to be shot in 3D, the fifth movie that Paul W S Anderson has written, the third that he has directed - all this in a decade and a half.