Take this one with a healthy grain of salt, folks. Bale is already committed to doing a third Batman film, and few people within the film industry consider Bale's outburst on set to be anything more than the result of a tense moment of filmmaking. Terminator Salvation director, McG, said at the New York Comic Con that Bale and the unfortunate DP who was the target of his rant were back working together less than an hour after the infamous incident occurred.
Furthermore, Batman Begins and The Dark Knight have both been great successes for Warner Brothers, and Bale's portrayal of Bruce Wayne/Batman has been a major part of that. So, it seems unlikely that the studio would be looking to replace him anytime soon.