User blog comment:Woganhemlock/The Sims 3: Seasons announced/@comment-121.54.29.82-20120802110646

There is no announcement yet but according to SimsVIP, Seasons might be announce during the event called "EA's Summer Showcase" which begins today (1pm Pacific, 3pm Central & 4pm Eastern).

You can view it here:

http://simsvip.com/?p=13696