Rumours concerning the imminent release of 21313 Ship in a Bottle, the next LEGO Ideas set, have been circulating for a couple of weeks. This seems to have been confirmed as Promobricks reports that the German LEGO store calendar for January and February contains a teaser for the set, suggesting that it will become available within the next couple of months.
The teaser image simply shows a dotted outline of the model, yielding no information regarding its piece count or price. Nevertheless, I think it is safe to assume that the set will be officially announced very soon given its apparent imminent release. We will relay more information about 21313 Ship in a Bottle as soon as it is revealed.