Conversation so far:
Is the death of the Rev and nightmare the name of an Avenged Sevenfold album?
December 28, 2009, Avenged Sevenfold drummer James The Rev Sullivan was found dead at his home at age 28. The album Nightmare was finally released worldwide on July 27, 2010.
Tell me more about what happened to Avenged Sevenfold between 2009-2011 besides drummer James The Rev having been found dead at his home?
Avenged Sevenfold members considered disbanding. However, the band entered the studio with drummer Mike Portnoy in place of The Rev for the fourth-album follow up.
What was the name of the Avenged Sevenfold fourth-album follow up album?
Nightmare is the fifth studio album by American heavy metal band Avenged Sevenfold.

Question: What did he die from?
Self-contained rewrite: What did James The Rev Sullivan die from?