The Antichrist is not Damian Thorn (the fictional character from the movie The Omen, which was about the Antichrist), and he does not have a tattoo of the numbers 666 on his scalp.
Only four explicit references to the Antichrist occur in Scripture: 1 John 2:18, 1 John 22, 1 John 4:3, and 2 John 7. The Greek word antichristos is not the evil twin of Jesus Christ, nor is he the exact opposite. The Antichrist is the enemy and adversary of Christ, but his power and influence are extremely limited despite what Hollywood portrays in film.
Jesus is definitely the Son of God, and he also reserved to himself the title the Son of Man. This does not mean, however, that the Antichrist must necessarily be the Son of Satan or the Son of the devil. The evil one likes to mock God and blaspheme what is sacred and holy by making cheap imitations or parodies (like the Black Mass in devil worship, the recitation of the Lord’s Prayer backwards, the inverted crucifix, or the antibeatitudes). So he could very well try to insult God by having his own offspring of sorts. All we know is that there will be an Antichrist, and he will oppose Christ.
The Bible is ambiguous about the identity of the Antichrist. Revelation (Apocalypse) 13:18 tells us, “Let him who has understanding reckon the number of the beast, for it is a human number, its number is six hundred and sixty-six.” Many scholars point out that in Hebrew, every letter (except vowels, which do not exist in the Hebrew alphabet) has a numerical value so that a name written in Hebrew would have a sum total of the letters. This is called gematria (Hebrew numerology). Early Christians thought the Roman Emperor Nero was the Antichrist. His name (Nero Caesar) transliterated in Hebrew has the numerical equivalence of 666 (50 + 200 + 6 + 50 + 100 + 60 + 200). Yet the world did not end at that time. Nero, however, did meet his end.
During the Reformation, some Protestant-printed pamphlets (thanks to the printing press) called the pope the Antichrist and called the Roman Catholic Church the Whore of Babylon. This was merely rhetoric meant to stir up the crowd and attack the other side. Today, there are a few who claim the Internet is evil because the letters “WWW” used to begin an Internet web page (from the “world wide web”) also add up to 666 through gematria.
Someone will rise to become a world leader and will attempt to lead many souls astray by renouncing Christ (apostasy). That person is the Antichrist. What many spiritual writers remind people, however, is that no one knows the day nor the hour nor even the month, day, year, or century. We do not know who the Antichrist will be.
What is more important, urgent, and fruitful is to not worry about the Antichrist but to worry more about the Devil who tempts us every day to sin. When and how the world ends does not affect where we spend eternity. How we live today will determine where we spend the ultimate tomorrow.