The 3rd Nolan film, which am calling The Batman will probably have the same 3 year gap or may even 4, they will need to fit it in to Bale's current Terminator 3 movie contract and am sure he would like to do some non franchisr stuff too.
I think we will see The Riddler in the movie as some sort of Joker esq character but one you would want to kill Batman unlike the Joker. You could also have him working for the Penguin (mob boss nothing to do with actually peguins) and also the catwomen as a high skilled thief.
However I think WB would not want Nolan having 3 characters in one movie because they will want to carry no the franchise past him and who's left after that ?
I think we will see The Riddler in the movie as some sort of Joker esq character but one you would want to kill Batman unlike the Joker. You could also have him working for the Penguin (mob boss nothing to do with actually peguins) and also the catwomen as a high skilled thief.
However I think WB would not want Nolan having 3 characters in one movie because they will want to carry no the franchise past him and who's left after that ?