Yes, there will be JWs going to Heaven. If they have confessed that they are sinners and believe that Jesus died to save them from their sins. All who call on the name of the Lord will be saved. There is no other name given under Heaven whereby we are saved. Many JWs truly love Jesus and whether they ever leave the organization or not they will still go to Heaven.
Salvation accomplishes a restored relationship with our creator.
This is almost exactly what Ed & Marion Dunlap came to believe, and told me so, some years after leaving the witnesses at the time of the Ray Franz blowup.
It is my suspicion (my unsubstantiated opinion only, note) that Ed was very close to accepting the full divinity of Christ (if not fully the trinity) by the time he died. One of his favorite statements at the time is that we have absolutely no way to know anything about Jehovah except what we might know by knowing Christ. In other words - that Jesus was the revealed Jehovah, and totally supercedes anything in the old testament, which he suspected may have been influenced by later Jewish ideas.
I never told Ed that I was actually an agnostic up to the time he passed away out of respect for his feelings. Marion suspected it, but we also remained friends and discussed all these religious ideas up until he died years later.