Fantastic! I'm always down for more Asajj Ventress and Cad Bane! I cannot wait.
I'm starting to really appreciate that they don't announce these things until they're already done and about to come out!
I'm going to assume that the fact that they didn't say that this will be the last one means it's not unreasonable to expect another one next year (they're usually pretty up-front about final seasons being final in animation.)
One also assumes the reason there was a two year turnaround between TotJ and TotE, and now TotU is the second one in as many years means that the first season was a test, and that landed then at least a further three season order once it proved it had legs.
Yes that's a lot of assumptions, but I really like this format. It has almost limitless potential! I can certainly see all kinds of possibilities. Like say; a
'Tales of the Rebellion' giving us a look at Sabine, both as an Imperial cadet and filling in the hole between 'Rebels' and 'Ahsoka', matched with three Kallus episodes, giving more of an insight into his arc from genocidal loyalist to rebel defector.
Maybe a
'Tales of Mandalore' to finally get into that year Qui-Gon and Obi-Wan spent guarding Satine, matched with whatever was going on with Bo at the time and how she ended up with Deathwatch.
'Tales of the Sith' could get into the story Filloni roughed out for the Sith Lord of Malachor and what went down before her super-weapon was shut down, and perhaps an arc for Maul covering his childhood as Palpatine's apprentice (maybe even Talzin's involvement with Sidious?) ending with whatever led him to Malachor.