There's an interesting rumour from Germany: that the new mega-corp that will be created when Porsche and VW merge will be called Auto Union.
This isn't just another example of the Germans revitalising an old brand a la Maybach. It does make historical sense. After all, Auto Union was the amalgamation of four German car makers: Horch, Audi, DKW and Wanderer, which created the four-ring logo that Audi still uses today.
It also makes sense for VW, finally ending the confusion between the VW group and the VW brand.