My thoughts have changed over time, as I went from JW to Christian to eclectic:
Do you expect it to happen sooner rather than later?
I do not expect Armageddon in the sense of a battle between God and his armies versus the devil and his armies, in heaven nor on Earth, nor in the sense of a Divinely instigated destruction of anything here on Earth. The last time I believed in Armageddon was 1975. If the Earth comes to an end, it will be due to "natural" causes - war or solar change or meteor or entropy...
Who will be destroyed?
No one. To my current thinking, it's a fundamental error to think God has any intention to destroy anyone.
And how will they be destroyed?
Underpants gnomes? Sorry, see above - no one gets destroyed.
Do you believe that the entire human race will be divided by their destination of heaven and hell?
No. I believe everyone has the same fate at death. Again, it's an error to think God dispenses retribution or reward of varying kinds to different people.
Will the universe, including planet Earth, remain intact for all eternity? If so, WHY?
My understanding of what happens to stars and planets leads me to believe that at some point our sun will probably greatly expand into a red giant, toasting up the inner planets within itself. I don't remember from my Astronomy classes if the Earth would specifically be inside the expanded sun, or just get all crispy. Because: to the best of our astronomical knowledge, our type of sun is expected to progress to a red giant stage (but its been close to 30 years since I've cracked an astronomy text, and this may have changed). In any case, barring bizarre developments, it will happen well after I'm gone and there's nothing we know to do about it presently, so it's not much in my daily consciousness. I have flights of fancy about how one might "recharge" the sun, and of course lots of people have written stories about artifical planets or other artifacts, about colonizing the outer planets, about reaching the stars, about evolving or changing the human body for survival, etc., etc.
I tend to think that man will have bridged the gap to the stars by then and have colonized other systems (or integrated in other ways with other civilizations we might come across).
Or am I totally off the mark and asking the wrong set of questions?
Are there any wrong questions?