Well, the map itself probably doesn't take that long to make, but any testing and bug hunting to make it viable for the competitive pool might take one person quite a long time. And I'm pretty sure the majority of the map is being remade, not just a few boxes being moved around.
That is a fair assesment, I'd imagine we're going to see it sometime between the Berlin major and the start of the next year. But probably before the first major of 2020. It's worth noting that it will probably be out before it's added to the competitive map pool.