Yes, though TWS seems to have gone right up to the wire (and was delayed a bit, I think?) after she clearly struggled to write it. The clock is definitely ticking, though, but it depends to an extent, I imagine, on what form OWH is going to take. Presumably at this point PRH have said it can't simply appear as it would have if it had been published before the first Observer story last summer, so it's a matter of what a new version would look like. And the extent to which every statement is going to need to be pored over with a legal finetooth comb and corroborated with everyone else who is mentioned ahead of publication.
I remember someone linking an article, possibly in the Guardian, by a UK writer whose first memoir was being published shortly after the A Million Little Pieces scandal, and his publisher's legal team was all over every incident, and he was tracing people he hadn't seen in years to check they were ok with how he'd represented their relationship or whatever.
The issue is with OWH is that if SW, in it, is sticking to her story, that she didn't steal anything from anyone, ever, apart from a little 'mistake' at the Hemmingses, that they lost their house because of 'Cooper', that TW has CBD/S and had it before the SWCP walk, that her family are lying about her thefts from her mother and her PILs, that the 'confessions' are not by her, and we're all terrible meanies etc etc -- then surely it can never be published?
Because none of it would pass muster with a legal team required to see corroboration of everything by documentary evidence or someone supporting a claim.
Even if the original 'due diligence' on TSP involved, as I suspect, a cursory box ticking exercise, a glance at a medical letter that identified TW and mentioned the correct illness and some paperwork that established their house was legally repossessed (without anyone looking into the detail of why), that won't pass muster this time around.