Fictional movies you wish did exist

So I was rewatching a clip of the original Home Alone where Kevin is seen watching a clip of a fictional movie called Angels With Filthy Souls as I know that movie doesn’t exist in the real world, but I sometimes wish I could see it as it looks so cool for a 1930s style gangster movie.

Another example that I must mention is Sack Lunch as for those who don’t recall that reference, it was a movie featured in Seinfeld as the episode is about Elaine making numerous attempts to see the movie, but things don’t go well for her as her dislike of a certain movie causes her to get ostracized.

To me, this is something that has been fascinating me recently as sometimes movies will have a movie that looks really interesting within its universe, but again cannot be seen in the real world because said movie only exists within a fictional universe.