[edit 1st Aug: Spoiler; it is Dark Pink and NOT Medium Lavender! Feel free to read on nevertheless.]
If you live near a LEGO® Brand Store in the USA or Canada and have nothing to do at 5pm tomorrow the 1st of August 2013 and have a daughter aged 6 to 14 (or a son to be applauded), keep reading.
That's most of the caveats out the way; now look at this picture and tell me what you can spot? I
think I know what I see. New element. Oooooo. I'd love to know if I'm right.
The box is mostly made of what I
think is Medium Lavender, and I'm pretty certain those are some 1X4 Bricks in there - which are not listed anywhere as yet appearing in sets. It feels odd for an element to appear in promotional builds before actual sets.
TLG don't just make new elements willy-nilly, certainly not just for a
polybag that is available for a couple of hours on one continent. I would make a guess that this new element was included in a set 'first' in terms of TLG's development timelines, and the shorter development time required to make a wee model like this means that in the end it got released earlier than the set.