I'd snatch up IPs just to release them into the public domain. Let anyone who wanted to make their own version of the stories or characters. If they're good people will buy them; if they're not they won't. Let people make their own spinoff universes where whatever they want is canon. Turn Star Wars, Star Trek, DC, Marvel, LOTR, etc into the equivalent of Dracula or Sherlock Holmes.

Something that all of this has made me acutely aware of is that we need to grow up as a culture of creators. I don't mean that we should stop loving these cultural touchstones. But we need to stop playing in their creative sandboxes. We need to step out of the shadows of these universes created half a century or more ago. We need to create something new. We need to grow up and create the next Star Wars. We can't just ride on the coattails of more talented men than ourselves. We need to stand on their shoulders and aspire to something even greater.