If Switch 2 is the name, they probably ran focus group tests to see what people thought of certain branding.
Even "Super Switch" or "Super Nintendo Switch" it's easy to forget that a lot of people of a certain age may not understand "Super = successor". Sure if you grew up around the Super NES or close enough to it but that was like 33 years ago now. A 16-year-old for instance may not understand "Super Nintendo Switch = Switch successor because remember Super Nintendo?".