Seems like they're preparing a new part of Time Temple.

so nexon finishes classes this september ( they said they'd release all the legends this year ) then release future leafre or past leafre where they fight the black mage or some other boss. then finaly the door in ToT opens and Black mage can finaly be fought.
... okay... the parts past the new classes are mere speculation but hey. i'd be nice. future or past leafre is a great place to add 150 equips