I posted a thread on the subject of a Finnair aircraft a little under a month ago, and guess what, it has now been confirmed.
All flight numbers are changing to XLA, FJE crew are being trained on the Finnair and doing and XLA course and the crews will be wearing XLA uniforms. Still paid by FJE though as far as I have been told.
All crews will be mixing with XLA crew - no info on the winter yet but believe me, XLA are very unhappy.