https://inbetweenbetween.blogspot.com/2012/07/dorothy-fell-in-love-with-scarecrow.html

Dorothy and the Scarecrow were to fall in love.

A concluding scene back in Kansas after Dorothy's return was removed before final script approval and never filmed. If it had, we would look at Dorothy's relationship with the bumbling Scarecrow quite differently. In the end scene, Hunk (the Kansan version of the Scarecrow) is about to leave for agricultural college and asks Dorothy to write to him. This scene apperently was meant to imply that a romance would develop between the two. This is said to explain Dorothy's preference for the Scarecrow over her other two companions in Oz. Traces of this plot idea can still be noticed throughout the film however, particularly when Dorothy is about to leave Oz and tells the Scarecrow, "I think I'll miss you most of all."