You really think authors, book writing being the lucrative industry for writers that it is, are suing Universal/Sony/whoever to prevent their IP being infringed?
They don't do it anymore because the studios just pay for the movie rights upfront. The rights are cheaper than litigation, in many cases the studios only pay $100k, which is why it is news when they pay more than that.
They don't do it anymore because the studios just pay for the movie rights upfront. The rights are cheaper than litigation, in many cases the studios only pay $100k, which is why it is news when they pay more than that.