When can we anticipate a Galio teaser?

Title. I feel like it's so close, yet so far away.

edit : (the rework ofc)

edit 2: Did a Rioter really just post on this and delete his comment before I could see it? That is so cruel on so many levels.

edit 3: http://www.surrenderat20.net/2017/03/the-hour-of-need.html#more

Like always, Greenlore is right.