Thoughts on how we might go from WoL to WoD

[MetalSnakeXI1]

A huge thing to remember is that the previous WoD never stopped being on Hydaelyn's side or ever supported Zodiark. The Ascians have always been implied to be the Echo-users who are allied with Zodiark. The Warriors (whether of Light or Darkness) have always been allied with Hydaelyn. For that to change would require one hell of a set-up that doesn't have any foreshadowing.

Until 4.5 Part one hits, the WoL siding with Zodiark to become the WoD is at the bottom of my predection list.

But Hydaelyn is heavily associated with Light heck she is more or less the source of light for the world.I mean it is still possible to become WoD through Zodiark and then turn on him to be on Hydaelyn's side again but I doubt Hydaelyn could give darkness to her chosen ones.

iirc during the WoDs plot in Heavensward their goal was to kill each beast tribe's primal as many times as they can until the ascians can goad them to pray to Zodiark instead so I assumed it was Zodiark that gave them the power of darkness

.........then again you can become a dark knight while being at Hydaelyn's side so it's a bit confusing

[Cilia]

iirc during the WoDs plot in Heavensward their goal was to kill each beast tribe's primal as many times as they can until the ascians can goad them to pray to Zodiark instead so I assumed it was Zodiark that gave them the power of darkness

Not per sé. The goal was to have the Warriors of Darkness kill primals to the point the beastmen had to collectively create a new god (primal) to protect them - one more powerful than their individual gods. Though the Warriors of Darkness ultimately failed in this endeavor, Ilberd succeeded with the added bonus of starting a war with the Empire.

Zodiark Himself never factored into it.

.........then again you can become a dark knight while being at Hydaelyn's side so it's a bit confusing

The difference is that Dark Knights wield their own darkness - or more accurately their hearts, negativity and all - as a weapon, as opposed to wielding Zodiark's divine power of Darkness.