Finally listened to the new Magic Story podcast from this Wednesday.
* The Mending was around 60 years ago in-universe. This ties into how the Great Aether Boom on Kaladesh was 60 years ago. They don't explain how.
* The moonfolk children that were with Tamiyo in that one story are indeed her biological children. She isn't married.
* They left it ambiguous whether Xenagos went to the underworld when he died or not.
* Nissa is not necessarily permanently blue.
* They got a big laugh out of people theorizing that Marit Lage was behind Shadows Over Innistrad. That said, they were disappointed that everyone figured out Emrakul was behind it so soon. They were happy that the reaction to Bolas being the ruler of Amonkhet was, "Yes, everyone there is going to be evil!" and thus it being a fairly nice place would surprise readers as much as the characters in-story.
* Amonkhet mothers do not raise babies. They give birth then hand them over to mummies and viziers. Pregnant women keep training for 2-3 into their pregnancy. Time is set aside during preparation for the green Trial of Strength for coming to term, giving birth, and recovering.
* When talking about the hieroglyphics on Amonkhet depicting eight gods, they go wink wink nudge nudge about how wasteful it would be to just kill three gods.