I think Fenerbahce will sign with Melisa Memis as libero next season. I am almost sure they will send both Melis & Merve away. 2nd libero might be Aylin Sarioglu, whom I really don't like.
Honestly, I think local player transfers is more exciting to watch in Turkey next season than foreigners. There is a big uncertainty of where will local spikers go such as Meliha, Fatma Yildirim, Cansu Cetin, Guldeniz Önal etc. Especially Meliha's transfer will be very important for the top 3 teams and according to rumours, all three are interested in her.
I also read that Ferhat was supposed to come back to Turkey next season, I guess this failed since he wants Polen & Guldeniz in Romania.