Quote Originally Posted by SilkaN View Post
Source?
Patch notes?
It is from the interviews not long ago from 4gamer and Dengeki but there are other sources now mentioning this as well such as...

http://www.novacrystallis.com/2016/0...-4-out-sep-27/

New Main Scenario Quests
Soul Surrender will see the reunion of siblings Alphinaud and Alisaie Leveilleur and herald the return of the Warriors of Darkness. The script will vary depending on whether you have cleared The Final Coil of Bahamut, a raid that was introduced back in Patch 2.4: Dreams of Ice. The team encourages you to try and clear it before Patch 3.4!