Margaret (2011, delayed 4 years)
For his follow-up to You Can Count On Me, Kenneth Lonergan was unable to stick to Fox Searchlight’s mandate to keep Margaret at 150 minutes or less, resulting in years of post-production tinkering and conflict. Even Martin Scorsese was brought in to do a cut, which ran 165 minutes. Litigation threats compelled Lonergan to finally turn in the 150 minute cut, though you can see the original 3-hour movie on DVD.