As baptized or unbaptised Witnesses, no one ever discussed or even mentioned (at least in my JW experience) this topic:
"We are preaching about the good news of the kingdom. Why do we preach about only one hope - living on earth? Shouldn't we be telling people the whole of the good news - that they could (allegedly) be selected to become king/priests in heaven?
Heavenly-hopers in the org are now increasing faster than the earthly-hopers.