Normally I'm against such huge mergers - but Activision Blizzard is one of the most hostile companies against their users and employees I have ever seen. I can't imagine this being a bad thing for game fans.
Making $60 desktop games is just a horrible business to be in, the development costs are too high, and the return is too low. Why would you make a AAA title when you can make Candy Crush? It only makes sense to divert resources where the ROI picture is prettier.
I know that everyone is in for the money, but there's an undeniable difference in how they view the result of their work.
sometimes in western companies it feels like everyone is just sprinting towards a buyout / merger to cash out.