I thought about this AU and I realized I don't think this can be a complete AU swap considering her state of mind during the events of Revenge of the Sith and who she is. Here’s what I think an AU of this would look like, I hope it’s okay it’s not exactly what the prompt requested:
At the start of RoTS it would've been a few months (year?) since Ahsoka walked away from the Jedi Order and Ahsoka was disillusioned but she still helped the Jedi when she could.
Namely when she helped organize a resistance against Darth Maul (guy has more lives than a cat) in Mandalore. Ahsoka went toe to toe against Maul and if Order 66 hadn't been activated, she would have captured him.
So if we diverge from the moment Rex (Anakin's loyal right-hand man in the 501st) faked both his and Ahsoka's death the AU can start before Ahsoka goes into self-imposed exile, somehow Ahsoka managed to intercept a message from Obi-Wan about Padme's condition, and the rendezvous point at Polis Massa.( Read more... )