Actually Swen Vincke is only talking about the changes to the Ranger class in 5th edition through Baldur's Gate 3, I've read that article before. Nothing about the story or lore is revealed yet.
I´ve said
the podcast in the article: They`ve said some things about the story and the lore in several interviews. Just check the interview thread.
Ed: That interview was interesting, @Hawke

It confirms what Swen and Miles said in the podcast in 24.00: Swen said they "picked the canon WOTC ending of bg2 "