We ultimately don't know what the jurors are thinking when the trial ends, and we also really haven't gotten to the meat and potatoes of the defense's case. That said, the defense is also likely limited in their options. Jim France basically testified yesterday that it was his way or the highway and that's why we're here. His argument then rests on his way being legally allowable from the perspective of a chief executive gets to make any decision he wants for his firm (this is not true but he may want to try and make it that way in higher courts) or that he can prove his way is the best way by trying to use Penske to invoke the CART/IRL split's effects on that sport.
If NASCAR wins this trial, it probably won't "save stock car racing" because this trial has already exposed it's soft underbelly and litany of failings. It might, however, have some wild effects permitting of companies to control their employees and any independent contractors in a way that is extremely illegal now.