This has been open since 2018 and I’ll give it an extra boost because it is sorely needed. What I’ll try to do is explain the 2 main functionalities that should be implemented together to make this work in simple terms.
1) Add Collections to Collections.
Just like the main 2018 post by chubbycheese or additional examples like XyberDAWG. You should be able to select a Trilogy Collection and stick it in a larger collection (e.g. The Man of Steel Series into The Superman Collection, The Lord of the Rings Trilogy into Oscar Nominees/Winners Collection, or Toy Story Trilogy into a Pixar Collection)
2) Finer controls for the Hide/Show property in Collections
What jp.briggs said in 2019 should be highlighted because it’s something I continue running into and would round out the feature request. They say:
I created a Pixar collection, and added the Toy Story movies to it. Because I don’t want to hide one-off movies (e.g. Up, Wall-E, etc.) from my movie list, I changed the show/hide behavior to show individual movies so that these one-off movies still display in my list, but now, as a result, the individual movies are listed; so in my movie list, I see a Toy Story collection poster, as well as the 3 movies
I’ve encountered this, but in a slightly different and infinitely more annoying way. I have collections for every single Academy Awards show. This means that any movie that is part of a Trilogy and is nominated for an Academy Award can’t be hidden. This occurs because the Trilogy Collection has the Hide items in this collection attribute, but it is overridden by the larger Academy Awards Collection, which has the Hide collection attribute that leaves the items within it visible. This results in a slew of Trilogy or Series/Saga/Universe Collections that have one or multiple movies sitting visibly outside them. Example screenshots below showing The Dark Knight Trilogy, of which two films were nominated for separate Academy Awards, and what it ends up looking like.
The solution would be to either:
a) have hierarchical rules so the first setting you apply to a movie isn’t overridden by subsequent settings (e.g. make the Trilogy Collection first, which hides the films, and then any other collection that includes them can’t unhide them) or
b) add one or more attributes that signal to other collections the main settings to preserve (e.g. Hide as part of a Trilogy, Saga, or Series or Hide as a Nested Collection, which would then preserve the hidden/visible attribute even if included in multiple separate collections)
Both of these functionalities (nesting collections and adjusting the hide/show properties) shouldn’t be hard to implement and, given the years that have transpired from the original post, should’ve been added already. Rather than an enhancement, it’s a pretty glaring deficiency in the Collections feature.
Hopefully this gets resolved soon.