Grant Morrison stated at Wondercon 2006 that his first Batman story arc will be titled "Batman and Son", and will in fact expanded upon The Son of the Demon storyline, carrying in line what appears to be a remodeling of Batman's personality after the events of Infinite Crisis. DC has recently begun a new printing of "Batman: Son of the Demon", stating "A new printing of the classic work tying into the BATMAN story by Grant Morrison and Andy Kubert, in standard comics size for the first time!".
Just read that on Wikipedia. Not sure on the voracity of that but it seems Ibn al 'Xu'ffasch might be in continuity.