Star Wars Rebels Season 2 trailer and feelings (hope they don't betray me)

The first season of SW Rebels finished on a high note and it looks like season 2 won't miss a beat. This is a fascinating time in Star Wars lore S2 takes place about 15 years after Revenge of the Sith, Vader is completely consumed with anger and hate, for what he perceives as betrayal and failure all around him. Fifteen years to dwell on the betrayal of his friends and wife, the death of his child, his failure to not see the supposed plot by the Jedi to overthrow Palpatine and take control of the Republic, his failure with his apprentice Ahsoka...man the crew of the ghost have no idea what they're up against with Vader!
I'm curious if Ahsoka knows who Darth Vader is, personally I like the idea of her not knowing until he says something to her that only he would know and she discovering Darth Vader identity that way.
The other interesting aspect is SW Rebels is a bridge between RotS and ANH....but in actuality Rebels should bridge RotS and Star Wars Anthology: Rogue One. And with the rumor that Felicity Jones is playing Sabine Wren I wonder what happens to Kanan, Ezra and Ahsoka between Rebels season 2 and Rogue One since Gareth Edwards said there will no be force users in Rogue One. Will we see  Boba Fett in Rebels? Maybe, Will we see Capt Rex in Rogue One? Maybe. Will Ezra fail to become a Jedi? I think so.
Here's the amazing trailer for season 2 of Star Wars Rebels!