No, because neither company was sold nor went out of business.
So what's stopping every "buyout" of a company going out of business being called a "merger" for the sake of keeping IP?
I don't know if Bethesda is still supporting Fallout. As for Duke Nukem, since they did actually work with the series, they would keep the IP.
So you don't have to support any old products, you just have to put out a new product of terrible quality to keep the IP you purchased?
How long do you keep the IP you purchased after producing a terrible product with it?