Well, I guess you can say no one found a body.
I still think his death is was completely unnecessary. This might be a spoiler so....
I do think Cytherat could have been a good shared companion for Imperial players (though, it might be a bit trickier explaining why a Bounty Hunter would have him along but no impossible). Unfortunately, I don't think it will happen b/c of the whole 'death' thing.
As much as I liked her character, I'm not sure we'll see this either. She had a pretty specific role in the Makeb storyline. I'm not sure why she'd give up her career to travel around with some Jedi/Trooper/Smuggler and I don't see how she would even fit in with future story content (unless geological expertise was needed again). By contrast, Cytherat would fit into any future Imperial storyline.