If for any reason I had to put money on it, I’d bet the thing the other way i.e. that it’s the BRITS who’re going to get booted from the Falklands and that right soon. Sort of a longish story as to why anybody would bet it that way but Argentina joining the BRICS combine in the near term figures into it.
With what? Argentina, las I checked, had no sealift or airlift capacity, and little or no effective navy.
Brazil won’t pick a fight about the Falklands.
RAF Mount Pleasant, has a sizable garrison which can more than hold out until help comes.