You don't get it do you? Your physical body is composed of matter that is part of this planet. Your physical body dies and decomposes. You are not your physical body. You do not die. Jesus' physical body ceased to function, yet you here speak of his second coming. Therefore you agree he is not that physical body from 2,000 years ago. So scientifically, what is Jesus and so what returns? If he returns, it will be in a different physical body using a different name. He could be here now and you wouldn't know. Maybe he has already been back and even maybe he has by now even completed that life and left. We wouldn't know. Lets hypothesize that the words in the religious books tell of real events. Since each one of us is a consciousness or a soul etc., many ones around us may have been removed from here and we wouldn't know. The predictions of the bible etc may be manifesting around us right now. We wouldn't know. For a fresh though circumstantial hypothesis check the writer, S W Norton, eBOOK at Amazon. You never know. If he got it right, we're all on the wrong track. Test the hypothesis. That's the scientific thing to do.
I seldom think about the triumphant return of Jesus. I have managed to be convinced there was a historical person called Jesus, and now I take notice of the things he is quoted as saying, and I am in the process of trying them out. I have deliberately left those theological arguments alone. I want a practical day by day experience with Jesus. He is back already as far as I'm concerned. I invited him in and he sups with me, so to speak.
