Easter Eggs are a good addition only if:
1) there is a good enough joke to them
2) It's hard enough to find and trigger that the silliness of the easter egg acts as a 4th wall breaking reward.
If all one does if a reference (like your link/peter pan example) than it is just not good enough.
There's a random NPC hidden away with special dialogue based on your romance decisions. If you didn't romance anyone, they say "Unfortunately, you are maidenless."
