Heath Ledger’s death , the one who portrayed The Joker in “The Dark Knight” was very tragic. It was unexpected. After “The Dark Knight”, Nolan had a separate script ready where Joker was part of the story. After he passed away, Nolan had no intention of continuing the story. He didn’t want anyone to take Heath Ledger’s place as well. Until a good script came up where they had to change most of the scenes.
If Heath Ledger was alive, I bet it would have been much more brilliant than what it is now. Ledger was the one who caught our hearts, not Batman. This is an artistic impression, which I found in deviantart of what it could have been if Heath was still alive.
R.I.P Heath Ledger.