So that potentially puts the next chapter of the definitive Batman film saga with a release date of 2011.
Until then, I guess we just keep watching The Dark Knight: a film so overwhelmingly good that I couldn't bring myself to write a review of it. But if that movie was any indication, I suspect that the next installment is going to ramp up the "escalation" and start bringing in a lot more freak villains to Gotham City... and ironically, Gotham will come to realize that it has no other choice but to turn to Batman for help.
However the story goes: We're getting more Batman movie people!! That's always a good thing (unless Joel Schumacher is making the movie...)