Originally Posted by FeedOnATreeFrog
The same reason why nobody links the return of Bruce Wayne (in Batman Begins) with the first appearance of the Batman -- it's a staple of the character that won't go away, no matter how ridiculous it is.
Same thing with Clark Kent's glasses.
It wasn't handled very well in the movie but it's implied that lots of elite in Gotham died under Bane. The last time anyone saw Bruce was when he was about to go on "trial," so I think it's implied that Bruce was killed by exile. They really should have said something about how Gotham thinks Bruce died, though.