Always impossible to say things before they are in the active role. But she’s one of the few execs that actually oversees a fairly original, general entertainment, prestige division. So there are certainly worse choices. She’s also not exclusively raised internally with decades of stewardship of ‘strategic planning’.
I think Josh is a competent parks exec and sets her up well if they have a good, collaborative working relationship for the part of the portfolio she doesn’t have more overt experience with. She’s the natural candidate, IF Josh isn’t trying to over-reach his position.
Keeping him happy with some ‘collaborative’ decision making power I think is key to a successful transition. Same goes for the studio heads, but I think she understands that far better than Chapek, already. Disney is too big now for a micro-manager CEO.