I wasn't thinking of 2012, my bad. Just the 2013 ones where there was sadly no comments one way or the other.
Although I will say, to me it just sounds like they were commenting that Hasbro have to get a separate license than Takara, but not that they had tried to get it and got shot down.
Maybe its just me, but I view it as Hasbro hasn't put any major effort or plans into releasing the car MP's, rather than they can't or aren't able to.