The LC is certainly heavy, so I'm pretty curious to see what they come up with to shave off some of that weight. If we're going to have to wait for another 2 years, make it lighter with tons of aluminum and CFRP in the chassis and perhaps most of the car itself.
The GT-R Nismo starts at about $175,000 dollars, so I'd expect the LC F to cost about the same. Fortunately, with this new turbocharged-eight, a detuned version could liked fall in the hands of the next generation GS F, and bring it up to standard. I'll assume that they'll use even stickier tires as well.
If the GS F gets the F engine, then the old 2UR-GSE one will likely replace the GS 350 model and move that one down, to compare to the BMW 550i and the V6 to the 530i. All speculation.
The weight problem is the biggest issue. If Lexus can still maintain a front mid-engined rear-wheel drive layout with the large 4.0 liter sitting behind the wheels, the vehicle should plow a lot less. Michelin Pilot Sport Cup 2 tires or Pirelli P Zero Trofeo R tires are likely going to be used as well, but specially developed to be run-flats. Lexus has been adamant against offering carbon ceramic brakes, so enormous 8-piston brakes might be an option.
If Lexus is benchmarking the GTR Nismo, a car with 0-60 times of 2.8 seconds, then the LC F will be about as fast; blowing the tires off of its German rivals like the AMG GT S, the BMW M6, both the S63 and S65, as well as the RS7. At this point the LC F is running with the Porsche 911 Turbo.
Lexus has been very capable of building chassis in the past (like the GS), and we'll see if the LC F can beat the LFA (with the Nurburgring package) around Green Hell.