Re: 8 years of no Batman or Bruce Wayne, and NO ONE could pick up the trend?
In defense of the ending of TDKR, these films intentionally set out with a "what if Batman existed in the real world," premise. When dealing with a final chapter to that story, the film has to address the fact that Bruce will die and more specifically, that the he "realistically" cannot do this forever. In the comics, this doesn't have to be addressed. Bruce faking his death allows us to deal with his death on screen while still having him win by essentially overcoming death.