Transformers themed Micro Machines?
Back in the early 1990s, a toy company called Galoob created the Micro Machines toyline, and it was a huge hit (I was collecting the Star Wars and Star Trek figures, until they started getting greedy with boxsets that had just one or two new figures).
Hasbro also created Micromaster Transformers, which could have been a way to compete against it... but whether it was or wasn't, Hasbro ended up buying Galoob in the late 1990s.
After a while, the toyline died off, but recently (as I had noticed in a Target store earlier this year) they had returned, but even though Hasbro still owned the Brand, they were not producing them. On the packaging, Hasbro had licensed out the Micro Machines brand to another company to produce (basically they outsourced it, so that the other company was taking on all the risk, and Hasbro still makes a cut of the profit without doing anything), so if this rumour is true, it could be that new licensed toyline that has themed vehicles to include Transformers.
These first leaked images from China are all Movie vehicles, from the first three movies.