Trivia:

He wrote the script for Halley's Comet (2005) after his younger sister passed away of a rare form of cancer at age sixteen. The premise was of a young woman given six months to live and beating the odds to recover but everyone in her life still talks to her as if she was sick or dying which makes it difficult for her to move on and live. Kreisberg told Kevin Smith on his podcast, Fatman on Batman...