Near the end of The Dark Knight Rises, Alfred is fed up with Bruce's inability to let go of Batman and quit despite Alfred saying to him
"I've buried enough members of the Wayne family"
so Alfred leaves Bruce.
In the final moments of the film, we see Alfred, sipping his drink in Italy, as he spots Bruce with Selina Kyle-- just as he said he dreamed to one day.
In the interim, Alfred is gone to who-knows-where. His whereabouts are never discussed, never explained or intimated about.
So: was Alfred in on Bruce's plan to 'kill' both Batman and Bruce Wayne, so that Bruce could finally be free? Would they assume the League of Shadows had a way of keeping tabs on their actions, so their fight was just an act?