Also, if you’re eager to learn about what some of Rogue One’s characters were up to before the movie, I would suggest checking out the recently released book Catalyst: A Rogue One Novel.
That also means that all the new characters in Rogue One likely won’t be seen in another movie.
No surprise there, as judging by the content and dark tone, we suspect many of them will bite the dust.
There’s no need to release a Rogue Two because we already know how this turns out.