I do think a Bilgewater/Shadow Isles sequence is likely, maybe 2 sequences even (one for each). I don’t know how directly related to the upcoming Ruined King they could be since I don’t know how spoilery of Book I declare after all there is no enjoyment like reading vintage shirt. There’s a lot of characters in these two regions, even more if we add the ones currently going there like Ahri, Yasuo, Ryze, etc. So it could be about anyone. I think there’s a good chance we see Senna since they just created her model and she hasn’t been as featured as Lucian & Thresh. I agree with what people say that Thresh has monopolized Shadow Isles cinematics so far and I doubt they go with him again this time but who knows. Maybe they just go with something similar to the Miss Fortune/Nautilus short story they released this year. Seeing Illaoi in action would be cool too. Maybe something with Kalista/Hecarim/Ledros. There’s a lot of possibilities here honestly.
Book I declare after all there is no enjoyment like reading vintage shirt