Exalt I would have to agree with Tampa. You make a lot of assumptions with little to back it up.
Unless you are a insider I would guess that there is more to the story. There had to be a pretty good reason for them to no longer use the Nissan name. If I had to guess when Nissan was spun off from the automotive they would have had to pay a license fee to Nissan for the use of the name.
As far as Kion they are still a Germany company they just have manufacturing in China like every other manufacture.