Club Penguin Island will definitely have new areas in summer, but according to Megg, it’s likely to be May. Worldwide release however will not contain any new areas.
Update: Blizzard Mountain will be the one coming in May. Read more here.
These will either be the Forest, Mountains, perhaps even both or maybe even more! Only time will tell, but the team appear to have a great line of updates with April being “huge” and May getting new areas!
Be sure to check back for the latest news!