It was nice to see the concept art and hear some of the ideas behind the scenes, but we actually got very little information on the whole from this.
The show's visual style was greatly based on the original concept art of Ralph McQuarrie for the original trilogy, right down to the narrow lightsabers which Ralph had envisioned to be more like rapiers.
It has been 27 years from the invasion of Naboo until the show starts and 14 years since Order 66.
Ezra Bridger is 14 when the show starts. His parents, Mira and Ephraim, spoke out against the Empire and were taken when he was seven. Effectively made an orphan, although the ultimate of his parents is still unknown, Ezra has lived on his own on the streets ever since, relying on his wits and stealing to survive.
Ezra is Force-sensitive; this manifests in his extremely fast reflexes and his "Force-fueled ability to see things just before they happen".
Purpose and family is what he finds with the rebels.
Kanan Jarrus (formerly Caleb Dume) is 28.
Bravery, honor and perseverance. Kanan lost everything with the rise of the Empire and the execution of Order 66. He was only 14 when the Jedi fell, and he never finished his training. He followed Kenobi's message to hide and spent years merely surviving, drifting from world to world. Hera finally got Kanan to join in her fight for a lost way of life.
He is very self-conscious about his past and feels inadequate to be the one to train Ezra. In training Ezra, Kanan is "reclaiming his own journey from student to Jedi Master."
He wears the disguise of a bounty hunter and still wears Jedi boots. (The book says "his" boots, but I feel he must have gotten a new pair along the way because he had to have grown since he was 14.)
Hera Syndulla is a Twi'lek from Ryloth and an accomplished pilot. Now 24, she met Kanan six years ago on Gorse. She is the one who recognizes the strengths of others and is able to draw out the best in them. Without her stabilizing presence or empathetic inspiration, the group would implode at this point. We really need some backstory for these characters. Because what do we really know about Hera? What are her personal motivations for becoming a rebel so young, what is her history with Fulcrum, where did she acquire her ship which she had when she was 18, what happened to her family…
Sabine Wren is a 16 year-old Mandalorian schoolgirl. She is their explosives expert, highly creative and artistic. How did she end up with the Rebels? Why did she leave school? Did she simply disagree with what they were being taught? Did she have an ideological disagreement?
Garazeb (Zeb) Orrelios is approximately 39 and a former member of the Honor Guard of Lasan. He is the only crew member with formal military training. His homeworld was ruthlessly destroyed and his people annihilated by the Empire.
In season two, will we see Zare Leonis again, their inside spy at the cadet academy? Does he ever find out what became of his sister Dhara?