HA-HA-HA
obviously you don't follow le mans much,do you?
first off.. Audi (r18 e-tron quattro),Toyota (ts040),Porsche (919) and Rebellion (R-One) raced in the 2014 edition of le mans,not Audi, an RWD P30 and a Marek RP339H
second of all,they could have added more earlier prototypes like the legendary Peugeot 908 or Pescarolo c60 courage (among others) as well as Rebellion and lotus.
There are many group c's they could have added as well.. Mazda 787b,Jaguar XJR-9,Nissan R90 C,Porsche 956-962,Peugeot 905... as well as smaller team run cars like spice or cougar.
As for the p2's,i'm not as disapointed I must admit, but it would have been nice to see some ligiers,Oak racing (onroak) morgan-nissans or even some sort of lola-judd-nissan-zytek configuration.
So yes,I will state some big disappointments about the game considering this is a Racing Simulator,implying that there should be more racing cars (aka Prototypes,gt's,open wheel...) Than road cars (sports cars or supercars..)
Having said that,I'm looking forward to project C.A.R.S as i've never quite seen such a good looking Racing game like it.