"...based on the true events behind the most famous haunted house in Amityville, Long Island. La Scala wrote the script, which takes its jumping off point from the factual tragedy where Ronald DeFeo was convicted of murdering his mother, father, two brothers and two sisters. That was the grounding for the fright franchise The Amityville Horror, which focused on the next family that bought what seemed like an idyllic house in the suburbs. Eli Roth and Todd Garner are producing a film that is expected to be ready for production by September."

Source: Deadline