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59 of 69 Riot Posts
I suspect he will be an alteration of blitz's playstyle...with a couple twists.
His Q is halfway between Amumu and Blitzcrank, but based on the range it will feel more like one or the other. Since it has a minimum drag distance for the opponent, up close, you can reset an enemy's position if they escape. Far away though, you'll move much farther to them.
It has the added dimensionality of interacting with terrain, which means his gameplay is much more straightforward - he's not going to ambush you from behind a wall - because he can't shoot through the wall. He's going to come rushing out and attempting to hook you or aim it so that he can hit guaranteed terrain behind you.
His passive gives him a heavy incentive to switch targets in a fight - and his shield, if used in the right time in a fight, will add heavy DPS incentives if he's ignored. His initiation is more reliable but less controlled - so, a quick hookshot into an ultimate can ambush unwary foes. There's some interesting play patterns here. His overall theme is delayed but powerful effects.
A lot of the challenge of this guy was properly conveying the heft, size, and power that he looks like he has - which meant trying to find delayed effects that also feel gratifying and powerful.