Okay but I got to talk about this. SPOILERS FOR THE AHSOKA TRAILER*********************************************************************************************************************
In the trailer, Sabine calls Ahsoka "Master", and Ahsoka talks about training Sabine. Also when that new Sith guy says "Anakin spoke highly of you" you can hear Darth Vader's breathing in the background.
But I want to talk about Sabine possibly being Force-sensitive. If you think about it the show kinda hinted at her having the Force because she won the Darksaber which as we all know was made by the first Mandalorian Jedi, Terre Vizsla. Also she kinda just happened to find it in Maul's hide-out, and it kinda seemed like it was calling to her. Not only that but she had three Jedi train her, Kanan, Ezra, and Ahsoka. The only question is, how did Kanan and Ezra not sense it? I have a small theory that could maybe work.
We know that Ezra was born on the first Empire Day, AKA the day that Order 66 happened. We also know that Sabine is a few years older than him, so she would have been a toddler when Order 66 went out. Therefore the Jedi probably wouldn't have sensed her yet, nor would they want to take a Mandalorian child away from their clan as there already was tension with Jedi and Mandalorians. I'm sure there were many children born into Mandalorian clans who were Force sensitive but never were sensed/never brought to the temple for reasons I listed before. So maybe Sabine was one of those children, and the Force hid itself in a way so Kanan, Ezra, and Ahsoka couldn't sense it. A survival call if you will. Ahsoka later discovered along with Sabine that the later was Force sensitive when Sabine had an emotional breakdown or a matter of self-defense. I don't know if this makes sense, but I wanted to share this.