That guy who waits until next Wednesday won't get to wear a space suit, and that just makes you better than him.
The DLC is a throwback to the first game, which also offered the Space Suit at launch. It later returned as a free download for the game's birthday, so enjoy the exclusivity while you can. If you're still on the proverbial fence, check out the new trailer (above) and lose yourself in adorable whimsy.
I'm so happy this game is as awesome as I though it would be. I don't even care that it's winter anymore.