[Rich21IE]

I seriously doubt they would attempt to tinker with the current Nicene Creed.

[Verginius Rufus]

The "current" Nicene Creed is actually the version of the Council of Constantinople in 381.

Both the Eastern and Western Churches recognize the first seven ecumenical councils. The Catholic Church held a bunch more in the Middle Ages (a couple of which tried unsuccessfully to undo the East/West schism of 1054), but only two since the end of the Council of Trent.

[CTrent1564]

Here is one of the best summaries of the Creed issue. He was written by the late Cardinal Avery Dulles, SJ, and published in a Lutheran theological scholarly journal. I have a file that I Downloaded years ago and was fortunate to find this copy of it linked on this site.

http://www.keepthefilioque.com/2013/09/the-filioque-what-is-at-stake/

The Latin Tradition has a long history of teaching the filioque as a legitimate doctrine regardless if it is in the Nicene-Constantinopolian Creed, which wasn’t affirmed as an ecumenical council till Chalcedon in 451AD [I am talking about Constantinopile 381] for if you look at the Creed recited at Ephesus in 431, it is in the Nicene version of 325.