Kannan is dead, no expections. Ezra Bridger is BELIEVED to be dead. Star Wars Rebels ends with the crew after the batle of Endor. The small rebelion became bold, and with the decisive victory at the battle of Endor, the Empire's reign of terror came to an end. After the war, Zeb took Kallus along the secret hyperspace path the planet Lira-San. It was then that Kallus realized he hadn't destroyed the Lasat people, and that they were thriving on this new world. A world were he was welcome as one of them.
Hera fought in the battle of Endor, as did Commander Rex. By that time there would be a new member added to the crew of the Ghost. Specter-Seven Jacen Syndulla. Born to fly, just like his mother. And well we all know what his father was like.
As for Sabine, she used to think that Ezra was counting on her to protect Lothal. The planet and the people he cared for so much. But one day, she realized there was more to it, there was something else she was meant to do. Ezra was out there somewhere and it was time to bring him home.