It is easy to lay out criticism, hard to tell what a real answer could be. A writer friend of mine said it in a Hegelian way, that plots are thesis - antithesis - synthesis. You have some conflict and it is resolved.

You might make experiences that are about spending some time in a loved imaginary world with loved characters (The Star Wars Holiday Special or Star Wars: Galactic Starcruiser [1]) but inevitably people who aren't superfans are going to feel it doesn't appeal to them. You can make a profitable game (Azur Lane) which is all about fanservice, collecting, and little narratives -- and people are going to say it is degenerate and compare it unfavorably to normal single player games like, say, Hi-Fi Rush or even mobile games which have a clear story like Love Nikki. All the complaints that people have around big media franchises will still stand.

[1] https://screenrant.com/star-wars-galactic-starcruiser-hotel-...