I remember in the early version of the game (Trust me, I am playing the new version right now, do apologize in advance if there are any changes to the game's story.) that I played and was mentioned briefly, Ghart was talking about the repairs of his ship that were almost complete.
If, in Robin's story, Ghart's ship is fully repaired, I would think there would be a future DLC.
Here of some of my suggestions.
Isle of Man (Real Island, look it up)
Though it would be renamed differently in the game, this island in fiction is populated by men who are gay. Gay men who were deported/banished from their country/towns to the sea by ship and dropped off onto an island far from their homelands, never to able to return. Isolated from the rest of the world, they self-govern themselves to create/build a flourishing society. Similar to Wheelcum but more upscale because most men come from Upper-class roots.
Island/Land of the Dragons.
What if Robin takes a ride with Dodoro (literally) to an island where he once lived? This island is occupied by male dragons that usually live out their years by pleasuring each other day and night. But sometimes, by random chance, a ship full of exiled gay men is shipwrecked near their shore. The dragons treated and took care of them. In return, the men treated the male dragons with pleasure. So now, the dragons more or less treated these men as pets.
Nomadic Gay Giants
A small collective group of Male Giants was exiled from their tribes for being caught doing naughty stuff to another male Giant. So their group goes from one location toto avoidable avoid being hunted by their tribes. Now they want a place where they live in peace. This group can be sailing on a very large ship or walking through the mountains.
Gay Pirates
Yeah, the title says it all. I think their flag would be a Skull with two dicks at the bottom to form like crossed bones/swords (get it?). These Pirates capture Robin from Gharts Ship, who becomes a slave to the Captain and his crew's sexual desires. They return to their island, where they keep all their "booties" (Treasures and Men) in their cells.
That is it for now, will re-post more in the future if I have any more ideas that pop into my head.