A favorite among marketers, especially the ones trying to get you to watch television shows. Why is the word "all-new" necessary if the word "part-new" is never used? Also, has anybody ever seen anything that was really "all-new"?
I remember collectors grumbling about stamps being described as 'mint unhinged'. Well, if it's in mint condition doesn't that mean it's as it came from the printery, ie. without ever having had a hinge attached to affix it to an album page?
The only sense I can make of all-new is original, as compared to an old idea or product or idea that is being recycled in a 'new' form by a different enterprise.
Or suppose Boggle toys produce an action figure called Ted. Every year there're a few new Teds, just variations on a theme with same face, same body, etc. Then one year they call in a designer to do a makeover and refashion Ted for a perceived segment in the market. He gets a face which resembles the old but is distinctive in its own right plus a few extra muscles. I can 'almost' understand why Boggle might be tempted to describe him as all-new Ted.