A few days ago, the May 2020 issue of Nintendo Dream was released; it featured an interview with the development staff of Three Houses, which delved into the secrets of Fodlan’s birth, as well as spoilers relating to the key characters.
The interview itself is in Japanese, but thanks to fans, the important parts have been translated! Before continuing, please be aware that there are big spoilers for pretty much every route. Especially for the Edelgard and Claude routes.
Topics include the very first route that was written for the game (any guesses which one?), plus discussions about Edelgard, Rhea and Claude (which is where we learn his real name…).
By the way, for any Dimitri fans who are wondering, they do talk about him, but there doesn’t seem to be much new (which could be a good thing, as it means all the important stuff is already in the game).