I know of the awkward complicated issues surrounding VF-1 merch being officially sold in the US. Bandai doesn't want japanese sites to sell kits to the US because they want to sell kits through stateside distributors. And the stateside distributors can't carry the VF-1 stuff because of the Harmony Gold agreement. So that makes selling a Bandai VF-1 domestically a no go for the time being.
However. Harmony Gold can't stop people from buying VF-1 kits from Japan, which is why we can easily get the Hasegawa and PLAMAX kits. And since HLJ is kinda sorta being allowed to break the 'dont sell to the US' rule (though they seem to be allocated much less Bandai stock now as a result), it stands to reason that HLJ could sell a hypothetical Bandai VF-1 kit to the US, as long as Bandai gives them stock allocation. And since they can't sell it locally in the US, I don't see why they wouldn't allow HLJ to sell some to the US, since there's no domestic distribution to compete with, because of the Harmony Gold stuff. It doesn't seem like kits imported to the US by buyers (not retailers) violate the agreement. And even if HLJ couldn't get stock and sell to the US, I'm sure there would be other ways to get them.
But the main thing is, even if the US market had no access to them at all, I doubt Bandai would miss the opportunity to sell a HG VF-1 to the entire rest of the world. And I imagine a robust possibility of people across the world acquiring some to sell to the US through auctions and second-hand sites.
No mistake, I think they'd be hard to get in the US for a while, if HLJ was the only place you could order from in Japan, knowing that it's hard in general to get Bandai items from HLJ anywhere near release date.