Every once in a while, I see questions where the whole premise is just wrong!
Are we not supposed to "love our neighbors as ourselves". I am not saying that we have got there, nor will we while in this life in the flesh. Never-the-less, to love our neighbors as ourselves is our objective, is it not? So, then it is not to judge them.
Jesus said He did not judge, but as He heard He judged!!
To say we like or dislike other people is to judge them!!
Still Malichi writing an oracle from God (what God told Him to write) wrote:
Mal 1:2,3 “I have loved you,” says the LORD. But you say, “How have You loved us?” “Was not Esau Jacob’s brother?” declares the LORD. “Yet I have loved Jacob; but I have hated Esau, and I have made his mountains a desolation and appointed his inheritance for the jackals of the wilderness.”
If then you are not judging others but as you hear you judge, then the question in the OP would be, "Will everyone that God dislikes wind up in heaven?"... because we not to be leaning on our own understanding!
Therefore - if we are asking, if "Everyone you dislike will end up in heaven having faith in the Gospel?", the very question shows we are not seeking the Lord like we should! Thus, the question is a wrong question! Of course, the question was supposed to realize things about ourselves, but it reveals a lot more that we might expect!
Let me give an example:
I was talking to the Lord about Putin. It is hard not to dislike him under the current situation, and very hard to like him. Still, we are supposed to take our thoughts captive to Jesus Christ. Yes, he is a lot of trouble. He is a fearful man lack confidence and instead operating out of pride. He is not even leading his people into battle, like the kings of old, but is staying far away from his perceived danger. Yet his danger is not in that battle but in the battle, his is badly losing. It is in the nightmares that effect his sleep. It is in his desire to control and his fear that he might not control as he wants. Indeed, he has already lost that battle because of the spirits that have taken so much control over his life. So it is that spirits of pride and fear have taken over his life, and how now will he turn back to life and the truth (Jesus Christ)? So, it was explained, that Putin is losing control of his life and he can feel it in his spirit. So, the desire to have back control of his life (spiritually speaking) results in the actions that he takes in the flesh.
So, do we dislike Putin? Obviously, we should dislike the actions he has taken, but what about the man who looks like he most likely will spend eternity in hell and who from what I hear is already suffering the effects from the dark forces of this world. As for me, I am quick to take a dislike to him. As for the Lord; from what I hear there is still a great compassion and regret for even a man like Putin.
Then did we "Christians" fail to make it clear that our battle is not with flesh and blood, but with the dark spiritual forces of this world?
And in fact, are we even failing to remember where our battle lies - not with flesh and blood but with the dark spiritual forces of this world?
What does reading a question like, if "Everyone you dislike will end up in heaven having faith in the Gospel?" - are we talking about disliking the dark spiritual forces or have we forgotten where the battle lies? Should we not be "liking people"? The Lord reproves those He love. When I turn and listen to Jesus Christ my Lord, He reproves me - even for not like Putin. He again helps me realize where the battle is!
Eph 6:12 For our struggle is not against flesh and blood, but against the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places.
If we are going to dislike someone - it shouldn't be about flesh and blood should it? So, I got reproved, because I was starting to dislike Putin, forgetting that he is not one of the rulers, or the powers, or the world forces of darkness, and the Russian army is not the spiritual forces of wickedness in heavenly place, but rather they are those control by those we battle with, are they not? So, who do you dislike, when you say you dislike a person?
So to answer the question in the OP - if my likes and dislikes are righteous (being from God) then "No, I don't believe those I dislike we be found in heaven!!"
Still - I don't get everything right. If it is possible that Putin, the man, might still be able to turn back to the Lord Jesus Christ and be saved, could it also be that some of the "world forces of this darkness" might still be able (however unlikely) still turn back to Jesus Christ? It is written that "God so loved the world that He gave His only begotten Son..."