I'm afraid to share my ideas because they're built on a plot twist, and I don't want to alienate players who signed up for a completely different premise. However, because I don't seem to have much luck as a GM on these forums, I think it would be most fun to share my concept with all of you. 

In an exciting medieval kingdom, the ruler and their most trusted champion ultimately retire after leading their nation to glory in a few short years. They decide to travel to somewhere far away. However, the night before their journey, the find themselves in a dream. They don't recognize their own bodies, and appear to be alone on a beach. The forested island is full of dangerous creatures, other characters and a mysterious tribe. In real life, they've been asleep for just as long as they've been in their dreams. You can either play those outside these dreams, trying to maintain order, in addition to a number of characters who live on the island. 

In retrospect, I could perhaps try to pitch this RP without the plot twist element.