To me, it still seems that way. The Wetlands Pack definitely had some spring vibes with it being freshwater themed (the music in the trailer alone screams spring), the Conservation Pack had a warm and dry feel to it, and the Twighlight Pack was Halloween-themed, let's be honest. So I don't think it's pretty safe to expect a cold/holiday-themed pack to some extent. It could be an Aquatic situation too, where the pack has nothing to do with the holidays but contains highly requested, lucrative content, as December is the most profitable time of the year.