People literally put so much effort into looking for something to complain about...
I think they started off with showcasing Spring and Summer first to build anticipation, not because they're trying to hide something. The game's current sunny "weather" is already quite similar to a Spring/Summer climate, and so they're clearly saving showcasing Fall/Winter for last because it provides the most change to our game. If they showed off Fall/Winter first, would anyone really care that much to see Spring/Summer after? Because we already sort of have Summer in our game besides the rain/storms.