So, "Deadeye" The new champion

My theory is he is from Ionia and is either a shadow technique user or one that tries to prevent the shadows from corrupting people. All the teasers have the same shadow partical effect as Zeds or Nocturnes around the person. And in Garens you can even see what looks to be a revolver that looks to be made of the shadows firing the bullet. I could be wrong but my take is he uses the shadow technique.

I think he's a gunslinger or at least a sniper, Deadeye is pretty much used exclusively as a descriptor for accuracy with firearms.

i'm assuming a revolver, maybe a bounty hunter going after high priority targets for a multitude of groups? (Kinkou for Zed, Noxus for Garen, Maybe Zaun, or Vi's old gang for her, and IDK, Noxus again for Sona?)