Saving Icathia: Betrayals, Ressurection, Time masters, and wanderers

Alright so here's a little far fetched one but something I think would be interesting especially since their lore kind of hasn't been touched on First up I'm gonna be honest, I hate Zilean in game, however being a fan of leagues lore I began to wonder why he wasn't really doing much as powerful as he seems to be

He's been in like a pocket dimension of time for a long time trying to find a way to bring back icathia without something like flashpoint happening (from DC the flash when he rewinds time and messes things up) So I figured he's either gonna find something out, or never progress

Then Taliyah is guided to shurima by yasuo, talks to azir, and as we last saw her heading off towards xerath. What if Zilean finds that taliyahs raw mana potential and kaisa's symbiotic relationship could at least protect the city of icathia if he could travel back in time with them to defend the city and then send them back? So I thought, 'how's Zilean going to convince them?' He's a powerful AF mage so what if because Xerath is attacking taliyah he contacts yasuo from the past and has him instead go off to where taliyah will confront xerath, he saves her, and as thanks to Zilean they go together to help him. Meanwhile Zilean can tell kassadin where his daughter is and together they all unite to save icathia, although not all of its inhabitants would survive ... Or be unchanged