As for the Aventador I can see why it would be in Need For Speed (with licensed bodykits from DMC, Liberty Walk and Novitec to name a few) but in my opinion it would be too 'Exotic' (using a Need For Speed term there) for the game.
Judging by a blog post about Customisation a while back on SpeedHunters, they would want to keep customisation authentic even if they are using fictional bodykits. Take the Mazda MX-5 ND as an example - Since it is a new car there are not many parts available for it right now but EA have imagined what a RocketBunny kit would look like on it:
So perhaps if there is an Aventador in the game it could receive fictional kits but don't expect it to look as ricey as the bodykits in Need For Speed Carbon (hopefully!).