Unfortunately, the movie option for this story is not  for John Bird's
version.  But for the adaptation of the story made by Philip and Erin
Stead.  Kevin Mac Donnell reviewed that version on the Forum in August
2017. That review is online at:

http://www.twainweb.net/reviews/Oleomargarine.html

There is yet unexplored potential for study regarding Twain's intent when
he penned this unfinished fairy tale. I have yet to see a scholarly
interpretation that really delves into the historical controversies at that
time surrounding the invention of oleomargarine versus real butter.  Sort
of like Prince (butter) and the Pauper (oleomargarine). What happened to
John Bird and his work surrounding this manuscript is an example of concern
for $$ (greed)  taking precedent over scholarship.

Barb