X-Plus announced the 30cm Series Favorite Sculptors Line Rodan 1956 during their Summer Kaiju Festival now we have the actual figure reveal and info. This figure stands 36cm tall and has a wingspan of 50cm, it is based on an Asai kit, it comes with a logo base (standard version will have a different base), and retails for 28,600 yen (26,000 yen on the US site, 27,500 yen for the standard). It can be pre-ordered now from X-Plus with release scheduled for Jan 2021.
Update: standard version images added below (note this is from Diamond and it states "branded base" in their listing so the base maybe slightly different).