The Koch is close enough to death anyway, gotta mitigate the damage by taking out the younger ones. Maybe replace Trump since hes not a billionaire and just a mouthpiece? Plus those cheeseburgers can't be too far away from catching up.
The 3 most qualified, independent researchers and the 2 masters of subs as the crew that have a fully vetted up to date vessel to ensure a safe trip. Hopefully during their journey they could find more information in general to share and possibly be useful.