Scripture speaks (Matt. 24:5, 23-24; Mark 13:6, 21-22; Luke: 21:8; 1 John 2:18,22; 4:3; 2 John 7) about many antichrists appearing in the church throughout history. These antichrists teach against God's Word. However Scripture also speaks (Dan.7:8, 11, 20-21, 24-25; 11:36-45; 2 Thessalonians 2; 1 John 2:18; 4:3; Revelation 17-18) of one climactic "Antichrist." It is the pope and his successors who Martin Luther and the Lutheran Confessions explain fit the Scriptural description and marks of the Antichrist.
The word “antichrist” is only used in 1 John. The other passages you reference don’t use that term. It’s up to you and Fr Martin to defend the idea that the term “antichrist” makes sense apart from the description in 1 Jn 2 & 4.