Alright you primitive screwheads, listen up!
Okay, I know this isn't an original idea(I can use the search function, yay!), But I too felt we need an Evil Dead Skin and Gangplank fit the bill, considering he already has a sword and gun standard.
Here's my version of the Idea;
Flip his model and animations. This allows his right hand and sword to be replaced with a chainsaw.
Model the entirety of the skin based on Bruce Campbell's Army of Darkness/ Evil Dead 2 costume. Torn shirt, straps across the chest, bloodstains if possible. More clean shaven, like SF Gangplank, black hair, though. Flintlock re-skinned to be a sawed-off rifle. You know, the works.
Change the voice lines, naturally;
Joke- "Klaatu, Barada, N-phhmm*cough*"
-"That's right... who's laughing now... who's laughing *now*? "
Taunt- "Good, bad, I'm the one with the gun."
-"This. Be. My. BOOMstick! HaHa!"
-"Come get some."
Walking- "Shop smarter, Shop Bilgewater..."
-"Hail to the king, baby..."
Ult- Laugh becomes more maniacal instead of GP's more victorious laugh as is.
Special taunt/ interactions with MF-"First you wanna kiss me, now you wanna kill me!"
-"Honey, you got real ugly!"
-"Gimme some sugar, baby!"
Like I said, not in any way original, but I think it needs to be brought back up for discussion, as it's a really cool idea that also falls in line with Riot's philosophy of cramming as many pop culture references into LoL as possible.
The main problem I can see though is being able to do it with the remake coming up, should Riot need permissions to make the skin.