Hey well i saw the map lighthouse and i got to thinking, it would be cool to do a island like with hills and trees and stuff and then do a lighthouse on a cliff. Also i was thinking of doing a shipwreck, like a ship with holes in it and rocks etc maybe making like a sea monster infection game type to go with it.
Oh i plan on doing it myself. The shipwrecked map will have timed events on it. Like new weapons new places and eventually a way for the humans to escape to an island and try to defend it. The first one will be a island with a hut and lighthouse, zombies spawn on the beach at low tide, and humans spawn on a boat adjacent the map, you can either A. stay in the hut and boat/dock or make a run for the safety of the lighthouse.
I like your idea, but I would wait until Longshore comes out and see what you can do in Forge with that. Hopefully Longshore will allow people to go underwater (to an extent) and you could build boats and hopefully forge dinghies/rafts for the humans.
I was going to make a v2 of my map with a bigger lighthouse and a island and a cliff and stuff but maybe we could turn this into a friendly competition, may the best man win