In The Lego Batman Movie (2017), during Alfred’s montage of past Batman movies, the Joker is conspicuously absent from the films he’s present in.

Since one of the main points of the movie is Batman not seeing the Joker (or anyone) as a significant person in his life, it's telling that despite the other villains being in their respective films, he's not in any of his.

Even Lawrence the Boombox Goon made it in!