Well I think on judgement day, we will all still have a body and soul, both unbelievers and believers. When Lazarus died, Jesus raised him back to life just as he was before. I believe he will do the same with all of us. And so I believe that is what Jesus is saying in Matthew 10:28:
Matthew 10:28
And do not fear those who kill the body but cannot kill the soul. Rather fear him who can destroy both soul and body in hell.
He's saying don't fear those that can kill you (the first death) since that doesn't do anything to your soul. Everyone will be raised again with their bodies and souls to face judgement day. But the second death is where both body and soul will be destroyed and God is the only one that can do that, so he is the one to be feared.