If they're looking to the Dark Knight Rises, it is going to be a very very loose version of it. That one is basically senior citizen Batman. This movie is going to be their first step towards the Justice League and they can't do that with an old, at the end of his career/life Batman. The articles I've read today said they were looking for a late 30s, early 40s age for Batman, so it will be very different.
They had the heavy rumors last week of Warner Brothers throwing a $50 million offer at Christian Bale. That alone if true give some support to the idea that they have considered it being the same world as the Nolan movies.