Did the inhabitants of other worlds have their own council in heaven, or were we all together?
If Heavenly Father is still creating new spirit children, do they have councils?
Heavenly Father has said _
"And worlds without number have I created; and I also created them for mine own purpose; and by the Son I created them, which is mine Only Begotten."
As we read from there to verse 39 we come to understand that God is continually in the process of having children and supplying them with worlds to live on.
Our Heavenly Father cannot force us to come to earth, nor to take upon ourselves a spirit body prior to coming to earth. We must remain free to make our own decisions as an eternal intelligence.
"All truth is independent ... to act for itself, as all intelligence also; otherwise there is no existence."
Without freedom of choice our intelligence ceases to exist. If we become bound by sin our intelligence ceases to exist that bit more. If we follow God's instructions we begin to exist more: We become more intelligent.
So for God to place us upon an earth it is required that we listen to the choices that will be presented to us, and make our own personal decision. This is referred to as "the Council in Heaven." At these councils our Heavenly Father presents that although we will make errors as we are learning, these can be cleaned up by the atonement of a Savior.
We are informed that Lucifer had presented another plan _
"Wherefore, because Satan rebelled against me, and sought to destroy the agency of man, which I, the Lord God, had given him, and also, that I should give to him my own power; by the power of my Only Begotten, I caused that he should be cast down"
In spite of Lucifer presenting another plan there is no plan other than that which Jesus Christ presented that works. Satan's plan is flawed in that it supposes that people can be forced to live righteously. This is impossible because it takes away freedom of choice. As D&C 93:30 demonstrates an intelligence would cease to exist if it lost all freedom of choice.
We aren't given any numbers as to how many planets are involved in each council. But Joseph Smith is said to have stated that this is the only planet in this group of inhabited planets that would have crucified the Savior.
Heavenly Father is in the constant process of having spirit children and having them progress to be ready to come down to an earth. Therefore there is a constant flow of heavenly councils where all must make their decisions as to whether to follow their Satan or to follow Heavenly Father.