I'd say that's a stretch.
The spring AP won't be out until April, which is 7+ months away. That's a long time to be seeding hits, especially when ToA has yet to be released.
They've also done Lore You Should Know on other side places, like Realmspace and Spelljammer. It's more likely someone asked about Halruaa.
Plus, they've settled into a pattern where the spring AP is more reprints and is the less dramatic story (not being the focus of Neverwinter, minis, summer convention games, streaming storylines, etc). Coincidentally, it's also the AP planned and written when Perkins is the most busy, so the spring one often has reprinted elements.
They've been seeding hints for future APs since the, PHB, they plan ahead YEARS, they already know what the next 4-5 books, after ToA and XGE are going to be.