Anyways, that leads me to these little nuggets floating on the internet.
It looks like Iyanden will get its own supplement when the new codex drops (rumoured June 8th-ish).
My guess is this is where the new Wraithknight model will appear:
This guy looks awesome. Only complaints are I wish the arms weren't as scrawny and the head was a little bigger, but otherwise that is sweet. I especially like the cloved feet. Not too sure about the fluff though. Apparently it has a spirit stone AND its living twin as a pilot inside. If you are going to have a pilot, why not just have a Revenant Titan?
As well, here is the cover of Codex Eldar
And the new flier
Sorry that last one is so small and low-res. All I got.