Are you saying that you believe everyone will be resurrected when Jesus comes back? Or will it just be Christians? I know different Christians have different beliefs. What do you believe is going to happen to the resurrected bodies after that?
Good questions.
Yes, there are many beliefs, but the context of the Bible only teaches one thing. (It would really have to be harmonious in its teachings, if it's really from God, agree?)
What does the Bible say on this? Jesus stated, "Do not marvel at this, because the hour is coming in which all those in the Memorial Tombs will hear His voice and come out, those who practiced good things to a Resurrection of Life, those who practiced vile things to a Resurrection of judgement." -- John 5:28-29
(Notice, for the wicked, it's not a 'resurrection to damnation', as some Bible versions word it. Why bring someone back to life, if they're just going to be killed again? That would make no sense. The correct word to translate the Greek here is 'judgment.'.)
More about this judgment later, if you want.
Both the good and the bad will be resurrected.
Also, the Apostle Paul wrote, "....there is going to be a resurrection of both the righteous and the unrighteous." -- Acts of the Apostles 24:15
Do you see the future tense that Jesus and Paul used? ( I highlighted them in bold type.) So it hadnt happened then. Plus, Jesus gave more information in the next chapter, at John 6:40 and John 6:44.
Also, did you see where these dead ones will be resurrected from? Their memorial tombs! He didn't say they'd come out from heaven, or a burning place.
For right now, they are, as Jesus said about Lazarus at John 11:11-14, "sleeping", a sleep from which they can only be awakened by Jesus.
They will be resurrected with new bodies -- their old bodies, no telling where some of those atoms are at, now...could be still in the ground, or somewhere else.)
It doesn't really matter....don't our own bodies constantly renew themselves, about every 7 years or so? That's what I understand.
Anyway, our loved ones, and their loved ones, and their loved ones, and so on, back for hundreds of generations, all will be reunited, even apparently with their memories intact (I mean, they'll have to recognize their loved ones, right?), and will be given the opportunity to live forever (Isaiah 25:8).....all who want God's rule, that is. (Revelation 21:3-4, "death will be no more.) There may be those who refuse, we'll see. That's really where that "judgment" comes in, how they act after they're resurrected.
But it will be a joyous time!