My favorite theory is that they switched Zuma and Elon's car. Think about it, they were both at the Cape and Zuma actually switched launch pads to LC40 from LC39A (where Falcon is preparing to launch as we speak with the REAL Zuma). :D
Okay, that's funny, but something like that isn't impossible. Remember the Glomar Explorer? These black project agencies are past masters of the big con.
Plus, video footage of the car in space could have been obtained in this launch, then conveniently released after Falcon Heavy launch. Neat conspiracy theory!