I dont agree with all of it but I think some would like to see it
http://www.joblo.com/next-bat-villain-odds
This is how I see it
1)Riddler, Catwoman, and Penguin
All within Nolans realistic realm and have proven track records as favorite villains
2)Bane
Can be done in Nolans world with slight tweaking and serves a physical threat Batman has yet to really face
3) Talia Al Ghul
all of ther above plus a "full circle" connection with Batman Begins
4) Black Mask
realistic, not done before, represents the mob, represents escalation, as a whole package deal it covers a lot of ground Nolan seems interested in.
5) Killer Croc, Mr. Freeze, Clayface
great potential as villains but lack a sense of uberrealism that Nolan seems interested in. Odds of these are very low which is really unfortunate
6) Man-Bat
Like number 5 yet completely and utterly impossible with any kind of tweaking to be done in real world. Dont expect it anytime soon
7)Hush
no proven track, doubt it will happen.
8) Mad Hatter, Firefly, Killer Moth, Lock-Up, Gearhead
has the characteristics to be in Nolanverse, but lacks a level of interest that the other options have
9) Deadshot, Lady Shiva, David Cain
physical threats, possible escalation elements, works with fugitive Batman status quo left by TDK, villains not yet used. I think theres a pretty high chance of one of these