Many of the props from Ahsoka S1 were recently shown at SDCC, however 'Sabine's lightsaber' raises the most questions for me. 

The prop below is labeled 'Sabine Wren's lightsaber hilt' and is very similar to Ezra's lightsaber hilt (also same colour blade), except for the top section which is very similar to the top section of Kanan's lightsaber hilt. Last we saw of Kanan's lightsaber is when Governor Pryce took it after Kanan's sacrifice, with the intent of giving it to Thrawn. 

So did Sabine modify Ezra's saber to pay respect to Kanan (or just improve it) or has she built her own, taking inspiration from both of her lightsaber trainers?

We know Luke's lightsaber is very similar to Obi-Wan's due to him following one of Obi-Wan's lightsaber tutorials on Tatooine, however I don't think Sabine is force sensitive enough to get her own Kyber Crystal, so she must be using either Kanan or Ezra's Crystal (probably Ezra's crystal due to the colour, despite Kanan not needing his anymore).

Perhaps Ezra will build a new one in Wild Space that will reflect what he has been through out there, with bits a scrap metal and other stuff put together. I reckon it would look pretty dope. 

I'll be interested to know what you think.