Awhile back I also thought the Z may go up market, especially with the rumored return of the S16. But I doubt that new since Nissan stated the IDx concept is dead.
Well that isn't 100% true. No official statement was made. But MotorTrend did write an article a month before saying expect to see a new "Supra" concept with FT-HS influences.
This teaser was also released before the official unveiling for FT-1.
Alfa Romeo Giulia QV roars its 510 PS bi-turbo V6 engine [video]
http://www.worldcarfans.com/115073197320/alfa-romeo-giulia-qv-roars-its-510-ps-bi-turbo-v6-engine
All-New Alfa Romeo Giulia QV Spotted On Public Roads For The First Time...
Technically there hasn't been any official news regarding drive train, just rumors and "leaks".
Yes, most likely getting BMW's I6; I was only day dreaming for a minute :p
Rumors from Motoring says the Toyota will come in two trims. "A turbocharged 3.0-liter inline-six... also expect a plug-in hybrid variant".
http://www.worldcarfans.com/115072196878/jointly-developed-bmw--toyota-sports-cars-to-be-about