"God is the same yesterday, today, and forever." There were prophets who spoke with God face to face before Christ such as Adam, Moses, Abraham, and Isaiah. There were also prophets who spoke to God face to face after Christ's coming such as John the Revelator, Stephen the disciple, and Paul. And so we shouldn't think the "heavens are sealed" or that "God has done his work" or that the "Master of the Vineyard has traveled to a far country." The Bible prophecies of two witnesses in the last day who will prophesy" (Rev11). If there will be prophets in the streets of Isreal in the last day, then why not now?
"Surely the Lord God will do nothing but he revealeth his secret unto his servants the prophets" (Amos 11).
If there were a living prophet of the true and living God, who would he/she be? I suspect he would be known as a prophet by his followers like Moses. He would humbly aknowledge that he is a prophet but not flaunt any supernatural powers or seek to bring power, fortune, or fame to himself. Athough he is accepted as a prophet by a small minority of believers, he would be generally overlooked, or possibly deemed a fraud by the rest of the world in general.
What would be he message? First off, A prophet professes Christ. So he would bare witness that Jesus CHrist is the Messiah, the Saviour of the World, the Son of God. A prophet is a special witness of Jesus Christ with a special commision to teach all nations, and preach Christ to all kindreds, tongues, and peoples. He would travel the world to inspire and exhort mankind to live the teaching and doctrine of Christ:faith, repentance, baptism by water and of fire (Spirit);and to be meek, be humble, full of love, patient, kind, and honest.
Next, a prophet is a seer. So he would be able to see things as they really have been, as they really are, and as they really will be. Accordingly, a seer would be warn us of the problems and ills of society and the future consequences of our actions. I suspect a seer would be inspired to speak out about the disintigration of families and family values, honesty, pornography and the internet, consumer debt, violence, alcohol, drugs and tobacco as well as speaking about war, terrorism and world conflict.
Finally, a prophet is a revelator. God would reveal to his prophet things that have never been known by man about the future. The prophet would not comment on the time of Christ's second coming for "no man knoweth the hour" but he would be inspired to speak out on the future calamities that have been foretold by ancient prophets in the scriptures and exhort us to prepare both spiritually and temporally for the disasters, plagues, famines, tempests, earthquakes that are to occur before the second Coming of Jesus Christ.