Star Wars Rebels finale

Since it was announced that season 4 of Star Wars Rebels would be the last season, I’ve thought a lot about how, if there was going to be a 3rd animated series (4th if you include Freemaker Adventures, but I’m forced to concede that nothing in it is considered official canon) they probably wouldn’t even hint at what it would be about until after Episode IX comes out, but then it seems that they went ahead a set up the next series in the finale.

( spoilers )