[GerritJ9]

Probably the latter; the B-534 was officially submitted to 1C but although screenshots were published on the Ubi forum it never made it into the sim. Ditto for several others which were announced such as CW-21B, Fokker D.XXI and F2A-3.
As for the chance of the B-534 appearing as a new plane through AAA- who knows.............