I think the idea of a Pirate-style Demigod is not only interesting and unique, it's also fantastically fitting for the trouble caused to the game during the first few days and I think a definitive must-have.
Captain Krew (Krew being Polish for Blood) would a humourous General Demigod rather than serious stylings of the others, and would be modelled more on LeChuck from The Curse of Monkey Island than the likes of Captain Jack Sparrow. He would be an Undead Pirate, who's main focus would be on his Minions - skeleton Pirates, of course - Stuns and Support rather than on heavy hitting.

History of Captain Krew
Captain Krew, the forgotten bastard child of the All-father, was cursed to an Undead existence as punishment for pillaging and plundering. Now, he lives his life doing what he does best: pillaging and plundering - aided now by Immortality! Almost perpetually intoxicated, Captain Krew has grown to rely heavily on the crew of his dreaded vessel 'The Walking German' in combat and is feared across the vast, blue oceans and also on several small islands.
Examples of Abilities
(add your own!)
Putrid Breath - The Captain's famously bad breath stuns his enemies for several seconds while dealing some small damage over time. Near-by enemies may also be effected!
Dawn's Crack - The Captain's ability to outrun his foes is legendary, this ability cracks open the ground allowing the Captain and all of his minions to escape to another, pre-selected location in a blinding flash of light, momentarily stunning his opponents.
Guns of the German - The Captain's vessel, The Walking German, fires down from the heavens dealing Damage to anyone - including the Captain - caught in it's radius.
Dead Man's Chest - The Captain lays down a magical chest. It's contents are random and collectable by anyone - health and mana, a new item or significant damage and even death lie within.
The Captain's minions would be where most of his DPS comes from, The Captain himself being unable to withstand heavy DPS and dealing significantly lower DPS than other Demigods. As such his minions would be automatically spawned - and cost no Mana. Upon killing one, another simply spawns in it's place. This would be significantly different from the play styles of the other Generals and I think a worthy addition.
Leave your thoughts and comments below!