Valentine of the Sprite Light Coven got the Pixie Woods back and removed all of the Iron from the land to do so.
She was successful in bringing back a Pixie temporarily, and she brought in a Jabberwock that we fought early on.
She mentioned that bringing them back is more like making the land more conducive for them being here, and they would come back on their own. They brought back Volvagia for Rina. The "Feywild" is more like an afterlife, not necessarily its own unique place.