This is where you can introduce another classic adventure story element into the setting; the "Robinson Crusoe" story. What if a fleeing ninja clan was blown off course? Starving and dying of thirst, a tiny remnant of them crashed on a reef just offshore from a seemingly paradisical island with a smoldering volcano in the background, and lush tropical rainforest around it. Rebuilding in this apparent paradise, they find that maybe it's not so paradisical after all... unique dinosaur-like monsters that developed in isolation prowl the jungle, tattooed natives in outrigger canoes ply the waters looking for human sacrifices, and occasionally, you find that a far-flung pirate ship makes contact because they've got a stash hidden somewhere on the island that they want to protect.
It's not much of a stretch from DINO-PIRATES as it already stands, just a slightly different take that relies on relative isolation from the rest of the setting. So, that gives us the premise for SHIPWRECKED ON THE ISLAND OF DEATH, an adventure that we should be writing right now.