Go Live and In Life both sold over 400k. I don't know how many of the people hyping them will turn into purchasing fans, but (provided JYP doesn't fuck them over by selling out in preorders or some stupid fucking shit) they could probably do and 600-800k with the Kingdom bump.
The Boyz got a 200k increase after Road to Kingdom. I think with the growth of the kpop fanbase in general where we're seeing all groups increase on sales, they can probably stretch that into at least a 300k increase.