The websites of small European LEGO stores continue to be a good source of information about unreleased products, where they are often listed before they should be.

Today, Brickshop.nl has confirmed the existence of a Porg set. 75230 Porg will retail for 80€ and contain 811 pieces, so will be somewhat larger than the version in the image, and likely to be on a par size-wise with last year's 75187 BB-8.

Source: Star Wars Collector via PromoBricks.