This healing period leads Bruce to see Ra’s al Ghul once again, though that recurrence of the character is ultimately a hallucination that Mr. Wayne has in “The Pit.”
Ra’s al Ghul, for all intents and purposes, died in Batman Begins; full stop.
The closest Christopher Nolan came to “resurrecting” him is when in The Dark Knight Rises, Christian Bale’s Bruce Wayne is recovering from his backbreaking confrontation with central baddie Bane (Tom Hardy).
So if you really wanted to take that moment as Ra’s resurrecting himself in Bruce’s memory, then you have your Lazarus Pit scene right there.