According to the latest "news", PD have indeed already secured the Lamborghini rights.
It's worth a note that they never in fact secured them for GT3 - they were allowed to include the Nomad Diablo JGTC by the team owners. Lamborghini then complained after the inital Japanese release. A hasty recode later and the car - still on the disk - was removed from the game and replaced by the Zonda Race Car.
Then, before the EU release (84 years later), they removed all trace of the car, to keep Lambo execs happy and lawsuit-free (they were worried about a technical breach of their licence elsewhere). Obviously they also removed it from the PAL disk to give us space for all the extra F1s and other goodies we got.
Oh, hang on...