Sounds like the plans to halt production on stand alone films may have been premature. From what I’ve been seeing the GoT folks are still moving forward with thiers as is Rian Johnson. Boba Fett looking to resume production after EP9. Sounds like there was a film cancelled and that it was a Mos Eisley spin off.
I think they really screwed the pooch by releasing Solo when they did. Going up against it’s own in house competition and Disney wanted it pushed to December but LucasFilm said no. Shame too because I loved Solo.