I'd venture WotC doesn't care in the slightest how some players wish to define things as either an overwrite or a supplement.  They're just making some books.  And people who want them will buy them, and those that don't, won't.  No different than every other book they've published.
				
			 
				 
 
		 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		