The only place "antichrist" is mentioned in the entire Bible is in the Epistles of John, where the author excoriates the antichrists, which are apparently "the people who deny the Son", i.e. Jews, and former Christians who've converted to another faith. Nowhere does it mention the End Times, though there is a link with morality and denial of the world. The entire thing reads like a message to a Christian community that is dwindling, which is described as being tempted by the worldly in a spirit of being anti-Christ.

Look at 2 John 1:7-11, for example.

Many deceivers, who do not acknowledge Jesus Christ as coming in the flesh, have gone out into the world. Any such person is the deceiver and the antichrist. Watch out that you do not lose what you have worked for, but that you may be rewarded fully. Anyone who runs ahead and does not continue in the teaching of Christ does not have God; whoever continues in the teaching has both the Father and the Son. If anyone comes to you and does not bring this teaching, do not take him into your house or welcome him. Anyone who welcomes him shares in his wicked work.

Is 'the' really the correct translation here? It doesn't sound remotely like a single person is being described.