Sorry, there are no transfers from the Legendary Servers (Treebeard or Shadowfax).
When both reach end of life: either they reach level cap or SSG decides that they are no longer viable (the fate of Ithil), then there will be transfers to regular worlds.
Until then, players can continue on the Legendary worlds or start alts on a regular server.
(This is not new. This is what transpired for Ithil & Anor. SSG has not changed this. Yet!)
Regards
Aurora7
(PS My sig is somewhat ironic. "Coming SoonTM" is normally far, far into the future.)
Refugee Status: Veteran (Windfola, Bombadil, Ithil, Anor, and Coming SoonTM - Treebeard)