Think about it it's almost as much as LucasFilm (4.05 billion which includes Star Wars and Industrial Light and Magic special effects) and Minecraft (2.5 billion) combined!
Anyone else wonder why they are doing this? It seems late for the game and quite a bunch of money. Maybe they didn't want someone else getting it.
And yes, I realize it makes a little over one billion a year - so it might be a really good deal.