Just how big will the Vvardenfell of the upcoming expansion be compared to the 2002 release? I'm just curious

I've heard that ZOS has taken the same map data from the old game though I'm not sure whether it's true or not. Was hoping to get answers from you guys since looking around google always brings me back to speculative forum posts.
Thanks!
"We are not now that strength which in old days moved earth and heaven, that which we are, we are; One equal temper of heroic hearts, made weak by time and fate, but strong in will, to strive, to seek and not to yield."
-Tennyson, Ulysses