They say they really like Starliner, and I think they mean it. After all, it's not that bad! If you offered me a free trip to space in it, I'd jump at the chance.
In fact I'd offer to pay at least 1/3 of my net worth. (Sadly this doesn't quite equate to the current cost-per-astronaut of, what, $150m?)
The most likely? Not convinced. Wouldn't anyone removed from Crew-9 just be shifted to Crew-10? So it'd seem silly to announce Crew-10 only to have to change it a week later.
And even if they don't care about looking silly in that way, they might instead just go with one empty seat 'uphill' for each of Crew 9 and 10. Because that's a less drastic change to make to Crew 9 at such short notice.
But maybe I'm wrong. So, assuming the quoted scenario actually is what happens ...
I guess they'd have to keep the Russian (Gorbunov)?
And keep the capsule commander (Cardman)? But she's never been to space, so maybe the pilot (Hague)? I can't immediately see if he was expected to be the ISS commander, but if so, I guess that would give them a good excuse to 'promote' him over Cardman?
Wilson has had more launches than Hague (3 versus 2ish) but a lot less time in space, and I don't know if she would be as well trained for Dragon as the commander & pilot.