My prediction is that N P-B is already pregnant. BB has spoken about wanting lots of kids in interviews. She's 30. That would give them some 'direction' for a few years - doing all the interviews / SM etc as if they were the first humans to have replicated.
I also think that Cruz GF Jackie Apostle - also 30 might even pip N P-B to the first Beckham grandchild post. That would be interesting - would BB cut his parents out of being grandparents and his siblings out of being aunt/uncles?
I think for D&V media exposure with their DCs has arguably paid off hansomely for them. DB has finished his career years ago but he is the most prolific brand collaborater - just raking it in. VB has been hammering away at her 'design career' for decades - bank rolled by DB (think she only turned a profit for the first time in v decades recently). She needs DB profile to boost her own and it has worked. Its not unreasonable that she sees that her DCs could have lucrative careers as no doubt they were courted by brands etc.
However having watched the Beckham NF doc - in all its polished glory - I still sensed a sadness around VB .... DB totally and repeatedly humiliated her and she must have been reeling with betrayal trauma whilst trying to style it out. DB has had his cake and eaten it - all of this would have been sensed, seen, heard by BB who is a bit out there on his own with the sibling age gap - and the oldest DC is often in the front line and buffer to absorb marriage shit. I suspect he was parentified by VB discharging on him (you can physically see her lean on him etc).
Ironically I think N P-B has the same needy, sad, disatisfied emotional energy as VB that BB sub-consciously sensed that as 'familiar' and 'home' - and consequently trauma bonded to her in the cliched psycholgical process of "re-enactment' where he is desperately trying to heal his own childhood trauma and purpose of trying to assuage his mother's deep pain that he experienced in early chilhood but playing it out with N P-B who undoubtable has her own deep emotional wounds and needs which are different and this will untimately go to pot. Simillar psycho drama process going on with H&M IMHO. BB is punishing his parents for lots of things that that he might never have considered if he hadnt met someone with deep insecurity and a need to alienate, control and possess another. A folie a deux.