OP is going be "Küsö Mesorogiwi" by Yousei Teikoku and ED going to be "Blood Teller" by Faylan
source of info was here
http://gendou.com/amusic/release/?filter=Mirai+Nikki
i am still trying find "the creator" song from Yousei i don't know if she released it yet or not
EDITED:
ah ok further looking into it, it seems the song "the Creator"
is going be T.V OP after all its going be released OCT 26 lol
EDITED 2 : nvm i was right first time XD