Okay, the official site updated today with some info regarding the upcoming expansion.

There are going to be pre-order gifts once again, they are as follows:

Pre-order from the EA Store and receive the special Bathing Suit download for your game. Pre-order now and get free shipping**! Use code S2SEASONFS when you order.
Pre-order from GameStop and receive the exclusive Raincoat download for your game!
Pre-order from Amazon and receive the special Bathing Suit download for your game!
Pre-order from EB Games and receive the exclusive Raincoat download for your game!

But this time they’re not only giving away pre-order bonuses - there’s ones to be had when the game ships! Shipping date is currently listed as February 27th.

The exclusive Swingset download will be available through Best Buy when this game ships
The exclusive Garden Trellis download will be available through Target when this game ships

See the information/pictures for yourself

There are also a few new screenshots and last, but not least - a video trailer!