I was just playing, and I noticed something about Azir and Taliyah. Their outfits look extremely similar, like the winglike trails from their arms. Azir can control sand, Taliyah can control stone. And then the part that made me more convinced, the next part of the Shurima story that was revamped for her release, is called BLOODLINES. Conspiracy theory? Maybe, but its possible!
Taliyah has no royal blood, it is confirmed.
Its obvious that Bloodlines reffers to 
, he will go to Shurima and defeat Taliyah because she is a noxian traitor.
You heard it here first.
Sivir is azirs last descendant,thats what triggered resurrection
The design choices aren't deliberate and are also down to clothes, not biology, so no true connection there.
Azir gained control of sand because of his ascension, and he's had it for less time than Taliyah has.
Bloodlines refers to most likely Azir and Sivir.
seemed pretty obvious but i think its more Azir chooseing between Talyiah and Sivir to be his successor seeing how he is now ascended
In Azirs lore that would be impossible because Sivir is the only other person in runeterra with his blood
