IGN went and answered just that with the pretty clever mashup above. They combined clips from Cars, Cars 2 and even Planes, with audio from the Furious 7 trailer. It seems to fit so well, it’s actually kinda freaky. Somehow, the editors even found a way to match up the lips on the vehicles with that of the dialogue from the Vin Diesel narrated trailer.
Not for nothing, but Diesel as the beat up, rusty tow truck Mater is THE BEST casting.