the Thrawn reveal is a surprise but given the context it fits the continuity of Rebels and it shouldn’t be too much of a shocker. If you’ve watched Rebels, Thrawn gets “teleported” (for lack of a better word) with Ezra (another Jedi in training). Sabine Wren (another Mandalorian) and Ahsoka go off to go look for Ezra and from there perspective, looking for Thrawn should lead them to Ezra.
It does tell us after all these years, Ahsoka and Sabine never did find Ezra or Thrawn yet. I wonder where the hell Sabine is at?!
The rumors of Mace Windy could be true if Grogu do make a deep connection to the force at that Jedi temple. It could also lead to Ezra who has been in a world between worlds - kinda like the speed force from Flash
Grogu being a youngling during the Clone Wars tho
Ahsoka looked amazing. Amazing to think her casting pretty much started with fan art