This is a photo illustration, to scale, of Red Bull Arena across Flatbush Avenue from Floyd Bennett Field.
It's intended to demonstrate how large a property Floyd Bennett Field (FBF).
In fact, I have another photo illustration that shows that FBF could contain both MetLife Stadium AND Red Bull Arena with room to spare.
Now, admittedly, there are problems with the site.
FBF is part of Gateway National Recreation Area and several of the buildings on the property are listed on the National Register of Historic Places. However, where I situated "Red Bull Arena" is private property. Also, I think some accommodation could be made to situate a stadium either adjacent to or within the property.
Just throwing it out there as "Food For Thought."