Hmmm, 25 years of experience in buying Golf GTIs and their close cousins leads me to think a lot of that is wishful thinking!
Most of the techno stuff mentioned will be expensive optional extras, the probable difference in the suspension will be that base model Golfs will go back to cheapo back axles a bit like US spec Jettas, thus the GTI will keep the rear axle we see now but in a wider track (Scirocco back axle?).
The extra torque from the Audi engine would be a bonus and save the re-map or not to re-map issue for many.
And cost? Will it be any cheaper than today's mk6? Do I have to answer that... ?
The hotter GTD sounds much more interesting.