At the San Diego Comic-Con 2009, Gary Oldman was starring on a panel for one of his upcoming movies when he was asked about Batman 3. He replied saying,
I think the next Batman is next year. We start shooting next year for a release in two years. You didn’t hear that from me.
This is sure a strange way to hear of any semi-official news regarding a third Batman film.UPDATE: (video) Gary Oldman interview that took place outside of The Book of Eli panel room.