For those who have seen the accompanying episode, DUME, I wish to propose something. While Kanan may be dead as we know him, I'm highly suspicious of that huge lothwolf that Ezra encounters.
1. Right off the bat, it calls itself Dume (that's how my TV's closed captions spelled it when it said I AM DUME)
2. The fur color, and eyes are suspiciously similar to Kanan's.
3. The marking on its forehead is the same as the one that Kanan had on his pauldron the first two seasons.
4. The credits for the episode list this wolf's voice as "The Force". Again, suspicious. Only time before something like that was when trying to disguise the actor for Fulcrum no. 1 (Ahsoka). And under such heavy modulation, I suspect it could very well have been Freddie Prince Jr.