> rogue former employee somehow acquiring IP rights over our core IP "Rogue ex-co-founder comes out of the woodwork X years later and claims they own half of y

> rogue former employee somehow acquiring IP rights over our core IP "Rogue ex-co-founder comes out of the woodwork X years later and claims they own half of your thing" is a horror story in startup land; see Facebook for an example of this. (The Social Network movie is a fictionalized depiction, but the real-world drama was sufficiently troublesome for Facebook that they initially weren't planning on engaging with the movie. Last minute they decided to rent a theater to take the whole company to see it, and Jesse Eisenberg started helping Mark Zuckerberg with his public speaking.)