With a possible Mt. Targon event I sense some Nami lore incoming...

And why? Because the events seem to connect to each other. The first event was Bilgewater, the Second was Shadow Isles that ALSO took place on Bilgewater. It only makes sense to give the events a loose connection like that so it's easier to read up if you have it all laid out.

But how are a run-down pirate nest in the ocean and a mountain in central Runeterra connected? The answer is simple: the moonstone Nami is looking for. Sure, our lovely fish probably won't be the main protagonist in that event, but I'm sure we have her in as some kind of supporting character, kinda like Olaf from the Bilgewater/Harrowing event (even tho he was the most awesome support character ever. UNDEAD MONSTER KRAKEN vs THE BERSERKER! I still remember the line when they are fighting their way throught he city and suddenly that thing shows up and Olaf is just like "THE BEAST!" and throws himself down the nearest cliff to fight it...)

While I doubt Nami would be doing something like that, I'm sure there is a way for her to shine in such a story ^^