I have an idea, I just don't know how to DM (well, not 4e anyhow): - this may be adapted for red riding hood or any other disney princess - with ariel being special challenge 
Prince Charming comes into the tavern looking for help. He heard of enchanted princess that sleeps in a castle surrounded by thorns. (The fact that in the thorns live specialy adapted goblins (druidic tribes whos shamans can walk through without trouble while PCs are attacked or take ongoing or some other kind of terrain hazard) is minor fact)
Goblins may be scaled up depending on the party level. And of course, sleeping beauty is actually dream hag or some other kind of dream nasty which attacks with illusory/shadow/dream stuff. If defeated, she makes available one boon to each character, something along the lines of prophecy - maybe some ritual to be used in the future like 1st level hand of fate...and of course, some loot
Then she goes back to sleep 

Prince Charming comes into the tavern looking for help. He heard of enchanted princess that sleeps in a castle surrounded by thorns. (The fact that in the thorns live specialy adapted goblins (druidic tribes whos shamans can walk through without trouble while PCs are attacked or take ongoing or some other kind of terrain hazard) is minor fact)
Goblins may be scaled up depending on the party level. And of course, sleeping beauty is actually dream hag or some other kind of dream nasty which attacks with illusory/shadow/dream stuff. If defeated, she makes available one boon to each character, something along the lines of prophecy - maybe some ritual to be used in the future like 1st level hand of fate...and of course, some loot

