Which IP/Franchise would you like to own and why? Would you get it to make new games or stop the franchise before it's run into the ground? etc etc.
However, this only pertains to video games, so if you say you would want Indiana Jones, your control over it could only be limited to making/not making games with that license.
I would want Zelda. I love the games to death but I'm a little afraid that they will always be the same as long as Nintendo controls the franchise.