The Bad Batch: 10 Things We Learned From The Trailer
8. Unfinished Kashyyyk Arc
Back when The Clone Wars was originally cancelled, a series of unfinished episodes and clips were released showing the episodes that could have been. This included the original unfinished cut of the Bad Batch arc that we later saw in all its glory as part of the final season, and it also included the Utapau Arc which saw Obi-Wan and Anakin stumbling upon a gigantic kyber crystal that the Separatists are after. If you haven't watched them already, seek them out on YouTube.
One of these involved the Bad Batch assisting the Wookies on Kashyyyk. The full arc was never released; only clips, but it was rumoured that these events took place right before Order 66 occurred. There are a number of shots in the Sizzle Reel that suggests a forest-like planet which could be Kashyyyk. Does this mean we are getting the completed arc?
Given that we had the Bad Batch arc finished for the final season of The Clone Wars, it's not outlandish to suggest that we'd get another arc brought back for this new series. It would also be good to see the Bad Batch back in action before Order 66 occurs, to reintroduce us to each character and, more importantly, show their newest member Echo becoming a part of the team.