I wouldn't completely exclude the possibility, but there are quite a number of factors against that:
(1) The countries for which they would actually be able to, in theory, sell them for decent money (i.e. not 3rd world with no money), all use UN-ECE motor vehicle standards, not US standards.
(1a) That means changing headlights, taillights, wiring, and controllers, because the US-spec lighting doesn't meet UN-ECE standards. Mildly annoying and a smidge expensive.
(1b) It may mean changing airbags or re-certifying the vehicles. The crash test requirements and procedures are different.
(1c) It means changing the instrument cluster. The US-market warning lamp that says "BRAKE" does not meet the UN-ECE standards which require a language-agnostic symbol. Even the Canadian-market models use that symbol.
(2) For the US-spec vehicles, the speedometer is in gibberish units for the rest of the world except the UK, and it's on the wrong side of the car for the UK. Change the instrument cluster ... expensive.
(3) Most of the rest of the world wants hatchbacks and wagons in cars that are in this size and price class. Most of the American-market models are Jetta sedans, which don't sell well in other markets.
(4) The US-spec emission control package, post-fix, is "different" from the rest-of-world emission control package. You could perhaps argue it is, or will be, "better", but I know how these certification tests work. "Did this particular emission control package (North American spec) go through this particular test (Europe)" - correct answer is NO - therefore - re-certification needed! Authorities are very "IF ... THEN ..." about this sort of thing. We can't use perfectly good and safe CE-marked, but not CSA-marked, electrical equipment in our electrical panels here in Canada. The inspector looks for that CSA mark, and nothing else matters!