Well, cant have 300hp at front wheels and 50hp and back with FWD based platform.
It could be an e-axle? Where engine powers battery that then powers RWD e-axle system?
Or maybe just what they want to call plugin RX.
They will have to figure it out - perhaps a higher performance version of DTV AWD. Audi does it with the Q5 and Q7 (Quattro) the upcoming MDX will have the 350hp Turbo V6 (SH-AWD)... AWD tech is an area where Lexus is severely lacking, and higher horsepower applications for FWD-biased platforms have got to be part of the equation. We know they are too cheap to make it RWD.