When all the stuff that's a prerequisite for it has been written, edited and implemented. That means KM's main story has to be done because Savin's focusing on that first, then the introductory Tychris content that's not related to the soulbind, then the Nareva stuff leading to the soulbind and the actual mechanics of it being implemented.
TLDR: Not Soon.
TLDR: Not Soon.