The best conjecture I can find at the sense of these words, is, that they signify the preachers of the gospel bold and clear foretelling the ruin of antichrist. There are divers kinds of fowls; amongst others, some that feed on flesh. These are those fowls here mentioned, such as feed upon dead carcasses. They are invited to the supper of the great God; called so, because it is made and prepared by the power of him who is the great God, or because it is a sacrifice to the justice of God: see 1 Samuel 17:46 Isaiah 18:6 Jeremiah 12:9 Ezekiel 39:17. God's justice upon his enemies is called a sacrifice, Isaiah 34:6 Jeremiah 46:10 Ezekiel 39:17. Idolaters were wont upon their sacrificing to have a feast; God hath also a feast upon this his sacrifice, but it is for the fowls and beasts, that feed on dead carcasses.
Related Commentaries of Revelation 19:17
Revelation 19:17
17 And I saw an angel standing in the sun; and he cried with a loud voice, saying to all the fowls that fly in the midst of heaven, Come and gather yourselves together unto the supper of the great God;