I could see it working as someone who called themselves something like a product/ market fit or pivot consultant.
You could come in on a big hourly rate and review startups products and the market, advising them whether to continue with the current idea or if not what kind of pivots would best fit the assets and skills they have built up.
Blog post I did on buying premium domains you might find helpful in your search - feel free to email me if you need help: http://franceschine.com/post/19837401405/how-to-buy-domains-...