Or how about this one? Buy Akira Toriyama to write a new Dragonball manga. Then buy all the people at Toei, to begin creating the new anime. Or rather Toei is way too cheap to do anything good. I would buy out a corporation that is better at creating anime. I could also make them re-animate the whole entire dragonball series in better quality. This would require billions and billions of dollars, and I'm not sure I could buy out Toriyama.
More realistically, I would want to buy the unopened Japanese Dragonbox of DB, DBZ, GT.