This car of course would be judged by the standard the Porsche 918 is setting as well as the upcoming Mclaren P1 and Ferrari LaFerrari. Toyota is witnessing what BMW is doing with the i8 so clearly they want to adopt some of that technology.
The LF-A successor may use the current V10 tweaked and supplemented by a hybrid drivetrain or even the BMW S63TU 4.4 liter twin turbo powerplant with electric motors. It sounds exciting either way but Toyota is going to have a higher performance sports car than BMW while using BMW technology to accomplish it? The automotive world just gets more strange with each passing day.