Re: Clearing up the ending of TDKR (MUST READ)
I must've missed the pearl necklace part I just assumed Alfred was taking his annual trips to Italy and he looked up and happened to notice Bruce at the other table.
As for Blake taking over as Batman I'd like to think that he'll keep the city safe for awhile but Bruce Wayne will always be there whenever Gotham really needs him.
A few of the Marvel Superheroes are somewhat niche characters that aren't extremely versatile, thus they don't have a lot of longevity potential. For example, Namor is a water guy, Silver Surfer is a space guy, Dr. Strange is a magic guy, and so on.