I say keep it the same, it was good last year, the year before...
I know what you are all thinking tho... an egguzo piņata.
Maybe... well, look... I could suggest a ton of things, but now I'm forced to only think of fun ideas that don't involve the whole playerbase congregated in one single area.
I guess... having a bunny or egg that runs/rolls around, like the goblin from halloween? Giving you eggs or maybe egg pieces (next, next paragraph)
Maybe a system that let's you search for specific eggs, making it easier to find the egg that you are wanting to trade? That would make people not sit in one area like graal dity or next to church, with "trading egg #." They can keep collecting eggs, while someone else accepts their trade for the egg they want.
Maybe, instead of a rabbit/egg dropping eggs for the hunt. They can drop egg pieces, and you can use them in a shop (maybe), which allows you to trade in for things like an rotten egg bomb. Maybe an egg-hatch gani (where you pop out of an egg). Carrots, food item.
Mini eggs, which you can use to bury in your house, and your friends can hunt for them. They collect, and maybe it can have a chest effect where it says "you are getting closer."
Let's see... they did chicken, rabbit. Have they done chick? or Maybe just an egg that rolls? Running frames, of course (Mounts)... Robot/Cyborg Chicken?
I'll add some more ideas, if I can think of some later on.