One thing that we can clearly see is that there are three Model Ys undercover inside the bowels of Giga (along with some others). I would be absolutely shocked if those three aren't Austin made SR, LR and P. I doubt they drove cars down from Fremont just to show them off.
One could be a paint job in one of the new colors only made possible by the new paint shop. Not one of the "standard" colors that have been accumulating outside for several weeks. If they offer that deep crimson 13 layer option that Elon has been driving I'm ordering it 5 seconds after they pull the cover off...
RT