Taliyah's lore and all, there is one more important thing to ask regarding her release.
I lied, there are two.
Since most people won't be able to find that story in a week anyway (and most likely never unless the game client gets updated), I feel there is a more important gameplay/art feature to talk about.
Will Yasuo receive Brand new in-game interactions with Taliyah?
I mean, obviously Taliyah is going to have one or two towards Yasuo and Azir.
Yes or no, there's another thing.
Will older champions eventually (possibly before the end of the world) and retroactively receive in-game interactions with champions more-or-less affiliated with them, without the need for a rework/relaunch/event/Obsidian Entertainment buying Riot Games?
Just to name a few:
x
x
x
->
x
(They are listed as "friends" after all)
x
x
x
x
x 
Wait, scratch the last one.