In a new interview with MuggleCast, producer David Heyman discussed the splitting of Deathly Hallows and an added scene! Listen to the full episode, with more great stuff from David, by going here or read the part about Deathly Hallows below.
The script [for Part 1] was written with an end in mind. The first draft was written with one ending and as we developed it, it went to another ending. And then we reverted in part to the original ending because we felt it allowed us a more emotional conclusion and felt like it was more complete, as it were. But we’ve added this other scene which I think is really amazing – and I can’t tell you where the break is, I’m sorry – but I do feel it will be incredibly dramatic, very moving and make people want to watch the next film.