That would be absolutely hilarious and simultaneously poignant.
I absolutely love Shikako and Kankurou’s friendship because it’s very low stakes but not shallow. They are actually fond of each other for no deeper reason than they just like each other’s personalities–Shikako doesn’t have to worry about if she’s influencing him too much (or not enough) and as far as Kankurou knows she’s weird because that’s just how she is and not she’s different from how she was as a child, why are you changing, what secrets are you keeping.
But I went into that here, no use rehashing it.
The idea of actress!Shikako and Kazekage!Kankurou traveling back in time from their bleak future to their less bleak but more dangerous past would sort of test that seemingly shallow friendship. They went through hell together and sort of drifted apart less by choice and more by circumstance. Would they have been united in their grief? Does that no longer apply since the situation that brought said grief about has been unwritten (and could easily be prevented entirely)? Will they actively ignore that bleak future or will it be something they share and acknowledge so as not to make the same mistakes?
I dunno, wildtabbykat, it’s a pretty cool AU of an AU of an AU.