My concern isn't that the movie won't be made, but that the 'creative differences' and constant director/writer changes we keep seeing crop up in Lucasfilms. It's apparent that the brass at Lucasfilms can't handle people who don't toe the line.
Solo technically had three directors fired, two working as a team; writers for The Force Awakens and Rogue One were replaced, Trevorrow was fired from directin Episode IX, and Gareth Edwards wasn't even trusted to finish out Rogue One so they brought in another writer/director to get the job done. And more than one of these has cited Kathleen Kennedy as the person they've clashed with, both, it seems on personal levels and ultimately on creative levels.
If the reports were true, that filming would happen next spring and scripts were finished and pre-production was in full swing, etc, and then now we have a new writer and it'll cause delays, then I think it's just par for the course with Kennedy and Lucasfilms. It's classic micromanaging.
The only SW movie that hasn't had a change in director/writer is The Last Jedi (tho Mark Hamill did publicly disagree with the script), and that's the worst of them all. It seems to me that the producers have a vision and anyone who doesn't bow the knee gets force choked. And if The Last Jedi is the result, well then, I think we can safely say their vision is blurred.
That's my biggest fear with Indy V. Not that it won't happen. But that the brass starts mucking with the story rendering the final result as either a sloppy mess (if people keep getting canned) or some kind of social justice agenda laden piece of crap.
The wildcard is Spielberg. Does he care enough to go to the mat over creative differences, or will he just toe the line?