Disclaimer, I haven't watched any gameplay except a little bit of the animator's stream, which didn't show much.
Would it be possible to show very quick clips (2-3 sec) or even just stills of associated footage when mode shots are successfully made? At the end, show a little longer clip to signify failure or success? I don't want the whole movie in the game, but use it to drive the story through the modes. That way a person doesn't have to win a mode to see actual Halloween imagery.
Add me to the list of people who weren't impressed with the current custom animations... hoping for improvements and changes here as well.