IN CORRECTION OF THE TRANSLATION:
Christians must correctly understand the important declaration made on oath by The Christ Michael the "Mighty Angel", for it stands between the existing "kingdom of the world" and the Sovereign Rule of God. The events described in Revelation 10:1-10 and 11:1-13 have already taken place. They are explained in The Opened "Little Scroll" and indicate that there being "no delay any longer", as verse 6 is translated in the New World Translation, is incomplete. Other translations that have copied this are The New English Bible and The Moffatt Translation, which read: "There shall be no more delay". But in translating directly from the Greek text Westcott and Hort offer a better rendering: "that time not yet will be". The time "not yet" that "will be" is when the seventh angel actually blows his trumpet to herald "The kingdom of the world did become the Kingdom of our Lord and of His Christ, and He will rule as King forever and ever." (Rev 11:15 NWT).
When considering the New World Translation, that there will be "no delay any longer", it raises the question: When the "seventh angel" was "sounding" his "trumpet" in preparation for "blowing" it, why was there need for this "delay"? The delay was necessary to allow "sheep"-like ones gathered through their exercise of faith in the "good news" of The Christ to be sufficiently sanctified to successfully come through the "great tribulation". (See Rev 7:13,14).
When in the apostle John's vision The Christ Michael the "Mighty Angel" "set his right foot upon the sea, but his left foot upon the earth", it was to signify that the oath he was about to swear by Almighty God related to the "sea" of mankind on earth. (Rev 10:1-7). He gave an oath that during the period when the "seventh angel" was preparing to blow his "trumpet", the opportunity to be gathered to God through the "good news" of faith in The Christ was soon to be "brought to a finish."
What is left is for The Opened "Little Scroll" in his hand that has been spiritually digested and recorded by a faithful anointed son of God to be "prophesied again" with reference to "peoples and nations and tongues and many kings." (Rev 10:11).
Now that the opportunity to be gathered through the "good news" of faith in The Christ has been brought to a finish, what remains is for people to give glory to God out of fear as they witness fear-inspiring calamities from God taking place on earth. (Rev 11:13).