Good writers freelance, they aren't available for hire.Maybe they don't need to buy a new publisher but to hire good writers.
Whilst this is pretty much exactly the method I use for creating D&D adventures, I'm dubious about it as a commercial publishing strategy, unless you do it openly, and are a famous writer:Other option can be a mash-up updating works from public domain, for example by Julio Verne, Robert Louis Stevenson, Walter Scott, Emilio Salgari or Cervantes. Popular folklore is full of almost forgotten stories.
Norse Mythology: Amazon.co.uk: Neil Gaiman: 9781408891957: Books
Mythos: Amazon.co.uk: Stephen Fry, G. Calza: 9788893817301: Books