According to some new rumors, there will be a LEGO Disney Castle Microbuild that will be given as a Gift With Purchase (GWP) with the Summer release of the Disney's Frozen Ice Castle (43197). The news of the Ice Castle (43197) originally surfaced back in March on the Canadian Retailer Renaud-Bray's site, which listed the set as coming in August with a price tag of $269.99 CAD | £169.99 | $199.99 USD | €179.99.
As far as further details that were released regarding the forthcoming GWP, Instagram User brick_clicker quotes the size of the gift set as being between 500-800 pieces. Since GWP's of this scale are usually reserved for the much larger,Direct to Consumer (D2C) sets—which are usually only available exclusively through Shop@Home for the first three months following release—the fact that the Canadian retailer had it slated as a Summer release means we may be seeing the large-scale Disney Castle sometime in May 2021.
There are no further details available at this time regarding the Disney Frozen's Ice Castle (43197), but if our speculation proves to be correct we should expect an Official Announcement in the coming weeks. I suspect the Ice Castle will be done in a similar vein to The Disney Castle (71040), so we can probably anticipate a similar price tag.
As always, considering previously that this same Instagram User originally reported the Microscale Castle as being an individual set available for retail purchase, we recommend you treat the news of the GWP equally as merely a rumor until more concrete details come to light.
We're going to report more sets that are coming in 2021 as the information becomes available, so be sure to subscribe to get notifications when new information is revealed!