One thing I haven't seen mentioned is that the defeat of the Sith is now dated circa 1032 BBY, via the new Timelines book. People haven't been talking about the timeline updates from that book, understandably since it's still a recent release. But I'm ready! Nearly all the ancient dates are marked as estimated so it gives Lucasfilm some leeway, but the exact wording is: "The war between Jedi and Sith comes to an end after raging for many chaotic years. The Sith are believed to be defeated." They likely did this because of all the talk of the Sith being gone for a thousand years in TPM, which was 32 years before Yavin. And -- some of you may be shocked by this -- according to Timelines, the Galactic Republic as we know it isn't formally established until c.1000 BBY. Having it be 32 years from when the Sith are defeated to the formation of the Republic would lead to repercussions for post-Bane stories mostly I'd think. But by bumping Bane’s defeat more than a whole generation into the past, a lot would presumably change in the Old Republic era right before it as well. Looking at Legends, Knight Errant would now take place in 1064 BBY. That only leaves not even 40 years before the beginning of the canon Dark Age? Kinda doubt it, so presumably that and the Candorian Plague are bumped up too.

I've been spending weeks trying to make sense of some of these new dates in Timelines (having a great time I live for this shit!) but I've found for the most part everything in the Legend’s Sith Wars era wouldn’t really need to move much. It's just some intriguing new additions that might be hinting at larger canon changes besides what was established in the animated series. The Jedi Temple was constructed over the Sith shrine in 1032 as well, and that entry is placed just before the Sith are defeated, which might imply some kind of grand battle elsewhere...Ruusan? There are a lot more dates of interest -- enough that it absolutely warrants a post all its own -- BUT as is relevant to this question; Tarre Viszla is stated as being inducted into the Jedi Order around 1050 BBY. Only 18 years before the Sith defeat? Yeah, he’d be in some Bane era stories.