There's a massive difference between books and filmed media. The former appeal to only a tiny niche audience.
Sure, but the books also tie in to the movies and shows, so if something keeps coming up in the books, there's always a chance there's a reason for that.
And even then, TROS tie-in books will soon be a thing of the past.
Not all of the background on Palpatine is coming from TROS books, some of it came from DK's The Star Wars book, which is a general overview of the whole franchise.
[/QUOTE]I honestly think Disney is going to be moving away from the ST. It's a closed loop. It's not an era in the franchise that lends itself to spinoffs or midquels or side stories or anything like that.[/QUOTE]
It lends itself to that stuff just as much as the other trilogies do. There is still a lot of time between Return of the Jedi and The Force Awakens that can be filled in, and you could probably still fit in some pre-TFA adventures for characters like Rey, Finn and Poe. There are probably at least a few ways you could squeeze in some new adventure for the different characters between the movies.
And Rise of Skywalker had a fairly open ending, with the Finn, Rey, Poe, Chewie, Rose, Lando, and new characters like Zori, and Jannah all still alive, so there's plenty of opportunity for more adventures for those character. Now that Rey's a Skywalker Jedi, I find it hard to believe she's going to just spend all of her time wandering around Tattooine alone. And there's a pretty good chance there's probably still some bits and pieces of the First Order still around that could easily cause trouble.
For whatever reason I've been assuming they won't go there, but how would they do it? CGI? Hamill is too old to play Luke in this time period and a recast would suck.
CGI cameo. At the end of the series Mando passes Luke some info that Palpatine is alive and cooking and Luke goes off in search of him which we learned about in TROS.
That's pretty close to how I'd imagine the show ending.