They posted a sneak peek of the halloween party on the official blog of cp and here is wat they said

“October is always a big month in Club Penguin and this year is no different! Over the next 4 weeks there will be a ton of new stuff including the Costume Catalog (with some new costumes and a few old favorites), a new Furniture Catalog, 2 parties, 4 contests, a brand new way to decorate your penguin, and lots more! I was able to grab a sneak peek of some of the decorating that the team is working on for the Halloween Party.”

they also say that the coming catalog is going to be super cool so save ur coins for it!

Waddle on!

This in the picture they say is the Club penguin forest