I really hope it happens as I've really enjoyed the events.
I've attended 2 and had lots of fun. It's a great way to celebrate the Christmas season.
The twist last year with the chickens was interesting but when I look back it was a lot of work to collect rewards. I did very well in the event however I spent many hours killing the 17,000 chickens and I didn't end up with the highest tally. If chickens this year I'd suggest the chickens have only 1 HP to simplify the task.