Stupid Aatrox Q idea.
Aatrox charges his Q (able to move while doing so) leaps into the air, becoming untargetable. Aatrox can move freely during this period at incredible speed, for a short duration. Reactivating this ability will cause Aatrox to descend quickly upon the area he is above, knocking up enemies he lands upon and slowing enemies around the area. If Aatrox does not activate this ability again, he automatically lands where he is.
This way he can drop aggro in fights with proper timing to reposition, and his Q feels like something a split pusher and a crimson angel would have. The counterplay is he has a limited range and the Q shows an indicator when he is about to land, so with quick reactions you can dodge it and render him without his only mobility spell for a while.
Also, his Q flight duration depends on how long he charges beforehand.