you can decide to break the egg, make a giant fried egg and it will be some new sort of buff-food, only useable once
jokes aside,
i guess this will become somehow relevant in a future update
maybe some guardian for the maze?
maybe a mount to fly with outside the personal allod?
maybe a replacement fot the pegasus-kelpie?
maybe a "toy" which will accompany you (like griffon, otter and so on)
maybe something storyline-related? (the story with the girl stranded on your allod was really nice!)
anyway im happy there is more content to the private allod!