By now, Batman has been "rebooted" several times on television with barely any interval between versions -- The Batman
ran simultaneously with Justice League Unlimited
, then Batman: The Brave and the Bold
came along right after JLU ended, Young Justice
overlapped TB&TB, and now we have Beware the Batman
coming next year. That's five different incarnations of Batman either overlapping each other or coming close on each other's heels. And that's not counting the multiple versions of Batman seen across the various DC Universe Animated Original Movies on DVD.
I'm sure Nolan understands as well as anyone that Batman is Warner Bros.' biggest and most profitable character (at least now that Harry Potter is over), and they're not going to keep him off movie screens for very long.