[Reelyator]

.....But for now, Kodi 18 is already in Beta, so no new features are to be expected soon. Using smart playlists would be possible alternative for you multiple set needs 

Thank you for your quick reply, Klojum!
I fully understand that this will not be implemented within the initial Leia release but maybe still worth adding to the wishlist of the next update;-) ? The Post from Karellen indicates that i would not be the only one appreciating this feature.

And one more thing: How could a smart playlist help me with this problem? From what i understand those are mainly intended for Music. And to my knowledge smart playlists cannot be displayed under Movies...