Friend:
I haven't seen either Barbie or Oppenheimer.
The linking of the two of them strikes me as strange but much about showbiz is strange.
Me:
Yes, their linking is odd, I agree, even after seeing both.It might be that Barbie World is clearly about having Kens be ancillary and the plot of the movie is Ken discovers the possibility of a more central role through visiting the "real world" (a fantasy Los Angeles). A new equilibrium is thereby explored (Barbies deal with more awakened Kens) -- but I'd say still not achieved, still immature -- reflecting the "real world" more for real in that way.
Oppenheimer, in contrast, is clearly a Ken World from the start, with Barbies ancillary. What Kens do left to their own devices is stratify into strict hierarchies with labeled ranks, organizational charts galore, regarding who should CC whom, what remains "eyes only" to the more top ranking Kens, what's above a Ken's pay grade. The noob Kens graduating from Barbie World are still miles away from hatching a truly he-man bureaucracy.