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When you assemble animation teams the way you do a live-action film, you're often struggling a bit to get a cohesive team together, so if you have a team that works well together, you're hoping for another film so that you can refine the team.

"Brad Bird Talks 'Iron Giant: Signature Edition', The Original Ending, And More". Interview with Matt Goldberg, collider.com. October 1, 2015.
When you assemble animation teams the way you do a live-action film, you're often struggling a bit to get a cohesive team together, so if you have a team that works well together, you're hoping for another film so that