However, there are rumors now that DHS will be expanded with Carsland the sequel... They even sent the lead imagineer from Disneyland to WDW.
That's the rumors right now. It would basically eliminate the Backlot Tour and Lights, Motors, Action. Along with that, they would be adding the red car trolley down Hollywood and Sunset Blvds and take down the Chinese theater facade and turn it into Carthay Circle. This would allow for removal of the hat. Also, the theater that houses Beauty and the Beast is supposedly going to close soon and be enclosed.
Holy crap I had not heard this. This is huge news. I wonder if Test Track would suffer the Wonders of Life fate if this actually happened (being abandoned if the Cars ride was built in DHS).
I can't see this affecting Test Track at all. The pavilion has a sponsor (GM) who just re-upped with Disney. And since the pavilion is closed right now for a complete overhaul and update, it's going to be a completely new experience that should keep the guests rolling in.
Personally, I'm not too fond of making Hollywood Studios into "California Adventure Light." I'd much rather see some other original concepts for the back of DHS.