It almost sounds like VW is simply taking the Fabia S2000 and transferring it to the Polo bodyshell. Of course the engine will be a 1.6T with more power, while Skoda is developing a Super Production version of the VW WRC with a Fabia bodyshell.
Then again, the Fabia and the Polo are basically the same car, so it should work out.
That won't quite be the base car. There will be some changes to the bodyshell to accommodate 4WD and a modified suspension layout. VW is simply going to copy the Fabia S2000 and make a WRC version out of it.
VW might be making their announcement this Thursday in Sardinia. I think this is it, VW will make their announcement, but I don't expect their lineup to be announced this year. Later this year, VW is expected to announce their lineup.
Well it's official VW is going to join the WRC in 2013 with a Polo R not a Scirocco. I guess the Polo rumors were right. VW could very well be running a Fabia S-WRC team to get experience for the new car.