Just to add some more speculation (non-insider)...
A front-engine car seems unlikely at first, but the GT500 cars at Fuji were faster in qualifying than all the WEC cars except for the LMP1 hybrids. And the NR20A is compact and around 600hp, so it could potentially fit the bill. Take that as a foundation, liberated from the comparably strict SuperGT regulations, with some KERS added on, and it could make a competitive LMP1 contender. And when you consider that the ZEOD's engine weighed half as much as the driver or full fuel cell, something similarly compact and light could easily go up front.
For some more speculation... If you look at the car under the sheet, the cockpit appears off-center. This would indicate a front engine with a driveshaft going to the rear axle. In addition, the claims of having a transmission at both ends could indicate a PTO-style AWD system, similar to the FF. IMO, using a CVT to vary ratios on the front axle rather than constantly slipping clutches could be a good application of the technology.
I also like the idea of two unitized block and head units from the ZEOD joined at a single crankcase (v6) with a transmission at both ends. Could end up around 150 lbs with up to 800hp. And it would remind me of what Miller did with his underdeveloped/underfunded but promising v8, four wheel drive car from over 80 years ago... but with better funding, better tires, better aero, fuel injection, composites, KERS, etc.
Of course, I am speculating with no solid basis for thinking this would really happen. But it is fun to think of what might be possible.