I have read every article posted on the Warhammer Community website about The Old World, and i reread both the articles you linked to on the presumption that you were linking to them because they stated that the miniatures would be as you wrote. The most recent articles on Warhammer Community about Kislev have some photos of some old WFB miniatures and some concept art for new units. In terms of speculation, insider information and leaks, and articles summing up 'what we know so far', from what i've read it's not certain that Games Workshop will be releasing a WFB type of game and it's not certain what scale any miniatures will be in. There is reportedly one industry insider that Games Workshop might use 15mm or 8mm.
https://www.warhammer-community.com/202 ... ge-post-2/
https://www.warhammer-community.com/202 ... ge-post-4/
https://www.wargamer.com/warhammer-the- ... lease-date
https://ageofminiatures.com/warhammer-t ... orld-news/