Sounds like Fr Martin was engaging in some bad exegesis.
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.