John tells us who and what is the anti-christ, firstly there are many as John says "Ye have heard that antichrist shall come, even NOW ARE there (=have arisen) MANY anti-christs" 1 John 2:18-19
So John says that although you have been told that there is the antichrist to come in the future, I tell you no there are many anti-christs and they are here now.
They don't need a building they just need the body of a man, that is the Temple of God. Now what is the form of the anti-christ as it takes up residence in the body of a man, it is a spirit - "this is the spirit of the anti-christ" and John says again that ye have been told that it would come, but I John say it is already here. And even more so today.
Well this is the definition of anti-christ:
22Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
Now we can see what Christ and Paul tells us about satan and the fallen angels coming:
24For there shall arise false Christs, and false prophets,
and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
I don't think he is talking about Benny Hinn either.
9Even him, whose coming is after the
working of Satan with all power and signs and lying wonders,
Satan shall be the one doing these miracles.
Lets look at Revelations and see what it tells us.
11And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon.
12And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed.
13
And he doeth great wonders, so that he maketh fire come down from heaven on the earth in the sight of men,
14
And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.
First beast is the one world government, second beast is the dragon; Satan himself.
What else does Christ tell us?
24For as the lightning, that lighteneth out of the one part under heaven, shineth unto the other part under heaven; so shall also the Son of man be in his day.
25But first must he suffer many things, and be rejected of this generation.
26And as it was in the days of Noe, so shall it be also in the days of the Son of man.
27They did eat, they drank, they married wives, they were given in marriage, until the day that Noah entered into the ark, and the flood came, and destroyed them all.
It will be just like when the fallen angels were here before.
9And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
He's coming alright.