"With 'Twilight,' you have these massive tomes that you have to condense. With 'Penoza,' we had an eight episode Dutch series that, just for the pilot alone, I condensed three episodes. So, there's a lot of filling in and a ton of invention that has to happen to fill out eight episodes."
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Source : "Screenwriter Melissa Rosenberg Talks THE TWILIGHT SAGA: BREAKING DAWN – PART 2, ABC’s RED WIDOW, the Status of AKA JESSICA JONES, and More". Interview with Christina Radish, collider.com. November 14, 2012.