A.T. Robertson Commentary Revelation 10:1

"And I saw another strong angel coming down out of heaven, arrayed with a cloud; and the rainbow was upon his head, and his face was as the sun, and his feet as pillars of fire;" — Revelation 10:1 (ASV)

Another strong angel (αλλον αγγελον ισχυρον). But the seventh trumpet does not sound till 11:15. This angel is not one of the seven or of the four, but like the other strong angel in 5:2; 18:21 or the other angel in 14:6,15. The sixth trumpet of 9:13 ends in 9:21. The opening of the seventh seal was preceded by two visions (chapter Re 7) and so here the sounding of the seventh trumpet (11:15) is preceded by a new series of visions (10:1-11:14).

Coming down out of heaven (καταβαινοντα εκ του ουρανου). Present active participle of καταβαινω picturing the process of the descent as in 20:1 (cf. 3:12).

Arrayed with a cloud (περιβεβλημενον νεφελην). Perfect passive participle of περιβαλλω with accusative case retained as in 7:9,13. Not proof that this angel is Christ, though Christ will come on the clouds (1:7) as he ascended on a cloud (Acts 1:9). God's chariot is in the clouds (Psalms 104:3), but this angel is a special messenger of God's.

The rainbow (η ιρις). See 4:3 for this word. The construction here is changed from the accusative to the nominative.

As the sun (ως ο ηλιος). The very metaphor applied to Christ in 1:16.As pillars of fire (ως στυλο πυρος). Somewhat like the metaphor of Christ in 1:15, but still no proof that this angel is Christ. On στυλος see 3:12; Galatians 2:9.