I’ve seen a large portion of the film, thanks to the press day set up by Pixar, and while Jackson Storm is most certainly not a nice person, what I saw stopped short of making him a real villain.
The toy that the young boy is apparently after is that of Jackson Storm, voiced by Armie Hammer.
Having said that, it’s unclear exactly how much Jackson Storm is really the “bad guy” of Cars 3.
Jackson Storm felt more like an obstacle than an adversary, though to be clear there’s still a lot of the movie I did not see, so things could certainly change.