I don't know if it is golden age or not (atlas age?), but does Warner own the short Third Dimensional Murder? They show it on TCM sometimes and it would make a good extra in this or House of Wax.
Given that its not clear whether Warner will ever again release a classic 3D title in 3D, it would have been nice if they had put that and Lumberjack Rabbit on this as extras. BTW: Do you need a special 3D blu disk for a 3D transfer? Could they put a 3D title and a 2D title on the same disk?