Most of those titles take place in the five years leading up to "A New Hope". Solo takes place roughly in the very middle between "Revenge of the Sith" and 'A New Hope". Fallen Order takes place about five years after "Revenge of the Sith".
Bad Batch looks like it will take place starting at the end of the Clone Wars. Meaning the actual transition from the Republic to the Empire, and the end of the Separatists, or their transition into being the early rebellion against the Empire. This also means the Empire would be using almost exclusively clones as stormtroopers for the first season or two. Repainted Republic ships and equipment as well. There would be a lot of cleanup of Separatist forces in those years. A lot of reorganization to make the Empire what it was. The Moffs taking their stations. A lot of order needing to be brought to the Separatist worlds by the Empire now that most of their droid armies have been shut down by Darth Vader.
And then there are the other surviving Jedi and Vader's new Inquisitors. Some of this was covered by the Darth Vader comics, so that probably won't come up much. Ashoka's off into hiding and her story was at least partly covered in a novel. Rex's story about finding Gregor and Wolfe has not to my knowledge. Rex would be listed as KIA, so no one would be looking for him after the Empire finds what happened to that unit after Order 66. But there are stories to tell. Jedi that are accounted for, but not exactly when they were killed. Luminara Unduli was on Kashyyyk, same place the Bad Batch was in the unfinished Clone Wars episode arc (some place Yoda escaped from with the help of the Wookiees). We know Luminara didn't survive capture, but its not stated how she was captured. She's one that wasn't outright killed by the clones, being executed later on and used as part of a Jedi trap for years. Seeing that the Clones were not interested in capturing a Jedi, as their orders were to execute the Jedi for treason. Unless somehow Luminara was able to convince them she surrendered and thus they brought her in alive to be executed. Or she also managed to escape Kashyyyk, but was later captured by other Imperial forces.
Also on Kashyyk was Quinlan Vos, who's fate is unknown in Canon and Legends, even Luke Skywalker has heard rumors of Vos surviving Order 66 and the Purge in general.