Baron Samedi is the loa of 'making sure things stay in the ground and rot' so they dont become zombies. Wouldn't he be kind of annoyed of all the ghost/zombie/demon ressurecting that goes on in Monkey Island. He also has a tendancy to get fixated on humans that he likes, both men and women. Would be funny to see Morgan getting 'stalked' and bonding with Elaine over it.
He's supposed to be a pretty wild character, chain smoking, bad mouthed and stylish.
I think it would be awesome to play as Elaine or even do a Broken Sword 2 style schtick where you have to swap from one character to the other to solve a particular puzzle. Elaine definatly needs some fleshing out. We even know who Morgan's first love was and what her pet was called. Does even Guybrush know that about Elaine?