I've had three novels published, and I was working a little bit in theater in Ireland. I wrote one film script just to see what it would turn out like.
I feel like if a film is well-written, then the character's arc is complete. There really is very little room to expand on that afterwards.
During the work, you have to be sure that you haven't left any holes, that you've captured everything, because afterwards it will be too late.

