Ya...
It is a remake in a sense.
Batman begins restarted the entire series of batman, so the dark knight is a new storyline.
There is two different movie series
The first is
Batman(1989)
Batman Returns
Batman Forever
Batman and Robin( the film that killed off the first series)
Then the new series
Batman Begins(2005)
The Dark Knight(200
So the dark knight is the sequel to batman begins.
And since this is a new version of batman...why do Jack has anything to complain about?
It is a restart dammit!