The Nicene Creed is an ecumenical statement of faith. It is not new and different doctrine, and is not ‘Thus saith the LORD’ in any way made to add or delete doctrine of the Word of God -so your point is without merit or foundation.
Jesus is the Last Word from God: There is no prophet in that sense, after Jesus, for God has nothing more to say to anyone in this present creation. Any prophet who speaks in the Church of God who adds to or takes away from what is already written as the Witnesses of Christ wrote them for us, as to new revelations, is under the curse of having his name blotted out of the Book of Life.
Hebrews 1
God’s Supreme Revelation
(cf. John 1:1-4)
God, who at various times and in various ways spoke in time past to the fathers by the prophets, 2 has in these last days spoken to us by His Son, whom He has appointed heir of all things, through whom also He made the worlds; 3 who being the brightness of His glory and the express image of His person
The Book of Revelation closes the eschatology teachings of God to mankind. Revelation shows the last things being performed whcih were promised to come, by Enoch, and the setting up of the kingdom of God on earth. Enoch and Revelation complement each other. The one is written before the incarnation of YHWH as Kinsman to Adam. The other shows the coming day of the taking to Himself His great power and ruling over His ransomed kingdom and restoring all things.
Rev 1:19 Write the things which thou hast seen, and the things which are, and the things which shall be hereafter;
Enoch 1 1:
[Chapter 1]
1 The words of the blessing of Enoch, wherewith he blessed the elect and righteous, who will be 2 living in the day of tribulation, when all the wicked and godless are to be removed. And he took up his parable and said -Enoch a righteous man, whose eyes were opened by God, saw the vision of the Holy One in the heavens, which the angels showed me, and from them I heard everything, and from them I understood as I saw, but not for this generation, but for a remote one which is 3 for to come. Concerning the elect I said, and took up my parable concerning them:
The Holy Great One will come forth from His dwelling,
4 And the eternal God will tread upon the earth, (even) on Mount Sinai,
[And appear from His camp]
And appear in the strength of His might from the heaven of heavens.
5 And all shall be smitten with fear
And the Watchers shall quake,
And great fear and trembling shall seize them unto the ends of the earth.
6 And the high mountains shall be shaken,
And the high hills shall be made low,
And shall melt like wax before the flame
7 And the earth shall be wholly rent in sunder,
And all that is upon the earth shall perish,
And there shall be a judgement upon all (men).
8 But with the righteous He will make peace.
And will protect the elect,
And mercy shall be upon them.
And they shall all belong to God,
And they shall be prospered,
And they shall all be blessed.
And He will help them all,
And light shall appear unto them,
And He will make peace with them’.
9 And behold! He cometh with ten thousands of His holy ones
To execute judgement upon all,
And to destroy all the ungodly:
And to convict all flesh
Of all the works of their ungodliness which they have ungodly committed,
And of all the hard things which ungodly sinners have spoken against Him.
8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.Paul does not think highly of doctrines from men, but says that all such are accursed.
9 As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.
10 For do I now persuade men, or God? or do I seek to please men? for if I yet pleased men, I should not be the servant of Christ.
11 But I certify you, brethren, that the gospel which was preached of me is not after man.
12 For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ.