I personally at some point would like to see a map on a boat. Wouldn't mind a Hijacked spin-off called "Diejacked" or something. But seeing as that may be too small, there should be a way to fly off the boat using the helipad (Parts opportunity) and fly off elsewhere.
Put some bikini zombies on that boat with zombied flying fish randomly jumping out of the water onto the boat and I'm interested. Maybe the boat could be in the process of sinking, too, thereby constantly changing the environment and inducing some major claustrophobia.