Producers Encyclopedia of Story Scenes

Most of my time is spent either writing, or watching movies on my computer. All too often I recognize scenes and situations from one movie story in another. I wonder if there is some group that keeps track of these things and use their lawyers to keep from getting caught impinging on copyrighted material from another work? "Marvel" seems to spend lots of time skirting the edge of legality. There was an author on BCTS who featured Strap on Wings in their work, and then died in Europe. I have seen those wings in more than one Marvel movie. Interesting.