Really hyped if Kang is playing an Inquisitor but hopefully not the Fifth one, his role in Rebels was fairly weak and a downgrade from the Grand Inquisitor from S1. Of course this can change for the better and they make him a compelling character here as with a lot of other SW characters that have been retroactively improved.
However what I’m really interested in is the prospect of the story not being completely set on Tatooine.