i suspect if anything is said, it will be something scobie approves, as they won’t want him retaliating and telling the truth about their collaboration
I suspect that your suspicions are right. Because I suspect that OS knows a lot more about them than he revealed in his book, and much of it would be, to say the least, damaging. It wouldn't surprise me if "collaboration"is the least of their worries.
When push comes to shove, there isn't a person alive who hasn't done or said something in the past that they would rather wasn't made public. We've all been stupid, or thoughtless, or even downright nasty at one time or another, or said something in an intimate moment that would sound silly and cause ridicule if it was bandied about - and the RF is no different to anyone else in that respect. When these comments are taken out of context, they can be made to sound even more terrible/ embarrassing.
The RF have done/said things that can be interpreted unfavourably - and so have Harry and Meghan. But it seems to me that only one side in this debacle is deliberately trying to goad the other, and it comes across as very nasty.