With weight down, wheelbase longer and wider but body shorter... handling should be much much more manageable with any increase in power/torque. Sloped back means centre of gravity moves forward slightly, could be a bad thing, could be a good thing. The extra width should compensate.
As for powerplant, 2.5T seems obvious but hardly likely unless they engineer something better. 2LT seems more likely, utilising the Skyactiv system.
There probably won't be an AWD system with the body shape since fitting the rear driveshaft would mean some much different engineering again. Possible, yes, realistically, no. I think they'll do something similar to the Scirocco R, keep all turbo FWD but with a little more Euro styling.
Most excited about the handling aspect with the weight reduction and wider wheel base.
3 MPS - Rolling on Pirelli PZero Neros, sitting on Bilstein B12's, stock internals... still makes me smile with the Zoom Zoom.