She-Ra And The Princesses Of Power season 2 is starting soon. I like that cartoons in recent years have story arcs that go for an entire season. For shows in the past each episode would be a stand alone story and there was little or no development. The new She Ra has interesting characters and a story line that keeps you coming back. This means there must be an ultimate end and wrap up of the story. How long that can go on is the question. Here are my thoughts on how the show could go for the next few seasons.

We saw at the end of season 1 that Catra has been promoted to second in command under Hordak. I think we should see a major offensive by The Horde. They could win a major victory by the end of season 2, leaving a cliff hanger. We learn more about the First Ones. Maybe they fought The Horde in the past.

Season 3 shows the Rebellion fighting back, gaining ground, and defeating The Horde. Catra quits or is kicked out of The Horde. She blames Shadow Weaver. The rebellion uses First Ones technology to gain an edge.

Season 4,  Catra bums around the Fright Zone and mopes. She visits seedy bars and gets into fights. Eventually she forms her own group of pirates who are not allied with any group. They steal from targets of opportunity. All the while Catra and Adora cross paths and we see character development. This is the season where Catra tells Adora "I love you." But Adora tells Catra that she, Adora, only loves Catra as a friend. This pushes Catra deeper into depression. Meanwhile the war between The Horde and the Rebellion continues.

Season 5 can be the final season. The Horde is finally defeated. Catra loses any desire for power or vengeance. She just wants an end to her emotional turmoil. Her hatred for Shadow Weaver increases, culminating in a confrontation where she kills Shadow Weaver. Catra makes peace with Adora but realizes that she still can't fit in with the Rebellion. She embarks on a quest of self-discovery. This could spin off into more seasons or a second show.
 

This is what I think so far.