I think his priority will be getting Phantom back up and running in order to get some stable money coming in from all the tourists that reliably go to see that, by the time it's allowed to reopen it'll likely need full re-casting and new musicians auditioned and rehearsed. Then he's got Theatre Royal Drury Lane (which he owns) to reopen in grand fashion, it's been closed for a couple of years for rebuilding, and was due to reopen in October with Disney's Frozen, which Disney probably want to go ahead with. That then leaves five other theatres that he owns, I realise he personally doesn't have to interview the ushers and bar staff himself but it'll still keep him busy moving money about to get it happening. Finally he's got Joseph to get up and running again at the Palladium next summer, for which they're already selling tickets.
I'm sure Cinderella will open eventually, but I reckon all the above will keep him very busy for a year or more, that he won't have either the time, or the willingness to risk money on a brand new show like Cinderella for the time being. We'll see in due course, but I'd be very surprised if he prioritises the riskiest of all the ventures and the most time consuming one, above everything else. I think Ms Fletcher would be best asking Cameron if she can go back in Les Mis for a bit, she had a nice "couple of songs then sit back" niche there.