I agree - as much as we enthusiasts would love 4WD on the Golf R20, it plays havoc with emissions when trying to get the same performance as its 2WD counterparts - the engine would have to be uprated to produce more power than the Rocco R20 to match the in-gear acceleration times and in todays climate, emissions seem to be the most important thing to manufacturers.
So my money is on - 2WD & 260bhp, so pretty much a replacment for the Ed 30 (but I've been told the engine isn't as strong as the Ed30 lump, so will need internals)
BTW, the GTi engine is a toyota unit - not sure on the R20 though??