The 3rd movie will never beat TDK but it still could be a solid movie inbetween 1 & 2 with a good send off. There will be a 3rd and if Nolan is not there to direct am sure we can hold onto the writing team or enough of it to make a good 3rd movie.
personally I want to see a new batcave and car though I don't mind if we have to wait quite long into the movie to do so. Also no Robin but I would love to see The Riddler who could take his twisted nature from Joker.
I think DAVID FINCHER could make a pretty good Batman movie...