We might finally have a glimpse of what's coming up next.
A giant yellow shield and bird wings might suggest Kayle, but as Skin Spotlight's noted: she's not up on the list for reworks, either visually or gameplay-wise.
Kayle is not on the Champion Update Schedule (https://t.co/VwIulYGUkE) so its 100% not a Kayle rework. https://t.co/Ul9IDdEpH8— SkinSpotlights (@SkinSpotlights) April 2, 2017
The silhouette suggests an archer of some sort, given what appears to be an angular object on its left shoulder and descending to its right hip -- the vague form of a quiver of some sort, so probably a new AD carry. There are some rumors that it might be the Phoenix half of a Phoenix/Harpy dual champion release, hinted at by anonymous sources. But all we really know for now is that it's a bird-themed thing with a shield.