'Cars RS 500.5' - New Cars Toon?

Last august Michael Wallis (voice of the sheriff in 'Cars') said this in an interview; "Cars 3 we're coming back to the road. And we're coming back to 66 into 99. The 6 is upside down, that's the road the runs right through central California." Did he really mean that there was going to be a Cars 3? Or did Michael Wallis actually mean there was going to be a new Cars Toon?

Mattel's showcase at the New York Toy Fair 2014 had new Disney toys including Frozen dolls, Planes, and Cars. At 4:42 of this video (released by Inside the Magic) the promoter for Mattel mentions that "This fall ... they will release a new short called 'Cars RS 500.5.' She went on to say that there would be 114 die cast vehicles available for purchase in 2014.

Pixar has announced 'Party Central' and 'Toy Story That Time Forgot' for this year but they have not yet confirmed any new 'Cars' shorts for 2014.

UPDATE: @ThePixarTimes tweeted at the D23 expo last year that there would be two new Cars Toons: 'Radiator Springs 500.5' and 'To Protect and Serve,' and that they would debut on the Disney Channel in 2014.