Four years of great animated entertainment. Like saying "goodbye" to a friend, it's hard to accept when so many memories are part of the relationship without any possibility of having any future opportunities.
Following the completion of Star Wars: The Clone Wars, Disney produced a second spinoff series focused on and featuring the world of Star Wars. The story featured the adventures of orphan Ezra Bridger who encounters a group of rebels trying to live with and frustrate the efforts of the Galactic Empire in and around his home planet of Lothal.
His acceptance into this "family" brings to him an awareness of the Force, developing powers through the Force (through his Jedi master, Kanan Jarrus) and his growing participation in the rebellion and ultimately the defeat of their presence on and their enslavement of his home.
Like The Clone Wars series, Rebels provides the viewer with a deepening of knowledge into the Star Wars story line through the characters created for the story. Their presence in the world of Star Wars allows the characters to interact with well-known characters of the stories such as Darth Maul, Obi-Wan Kenobi, Asokah Tano, Darth Vader and others. It made them "believable" - and allowed the viewer to recall facets of well-known characters from a different perspective.
Why is this such a big deal? Well, episodic stories which are rich in characters and events that are woven together adds to the depth of the story. And people like to feel a part of things by means of knowing; the more one knows the richer the experience.
I hope Disney will bring new animated adventures with new characters and quality stories. Ezra and his world will be missed. One good thing is that I can always slide a DVD into the player and watch the entire series over again.