In the comics, when Bane snaps Batman's back and cripples him, a string of various other costumed vigilantes takes turns protecting Gotham and sometimes taking the role an costumed look of Batman for themselves. In the comics, after Wayne/Batman is healed, one of his first big challenges is taking back his turf from one of these "babysitters" who won't relenquish it, and also doesn't play by Bruce's non-killing rules.
If this is the last Batman movie for Nolan and the current batman, the franchise needs a strategy of replacements for him in much the same way. Maybe this character is the start of that.
I would really like to see the next Batman after this one set about fifty years into the future. Like the animated version. There was a Graphic Novel that did this and it was awesome, as digital avatars of the original Joker (a virus) and Batman continue to fight for Gotham's soul, thru younger surrogates.