Personally when it comes to critic reactions, theres only one thing i want to hear, if it's better than TDK or not, it may not be that easy and it may be better in some regards and worse in others but overall it should be easier to gauge the experience in relation to the 2nd film.
In my eyes if it's not as good as TDK, then it's a slight disappointment to me, even if it ends up being one of the best films ever, purely because when you raise the bar with a film like TDK, Nolan strikes me as the guy who would only make another one if he believed and set out to raise it even higher. If he doesn't do that, no matter how good or successful the film is, he's failed somewhat.