"He also use to talk about how Nikon came from Zeiss Ikon during WWII in some type of Axis technology exchange, any truth to that story?"

I don´t know in this regard, I just know that many japanese camera companies incl. Nikon gained from the dispropriation and publication of german patents -incl. Zeiss- after WW2 through the allieds - secret or proprietary lens formulas, camera construction details, production methods went public by that and they were free to use them.