Re: "The Dark Knight Rises" Review and Discussion Thread (spoilers)
There were far to many characters in this story that didnt help Waynes journey. Blake and Foley among them.
Blake is integral to Bruce's choice to fake his own death at the end of the movie. From the start, Bruce has known that he can't be Batman for ever and with the appearance of Blake, Bruce now has the heir he needs to fully move on.
Without Blake, Bruce either dies at the end or survives and continues as Batman.
Some say that he was the first choice to play the new Doctor but turned it down when he couldn't put racing stripes on the TARDIS.
All we know is, he's called The Stig.