Rule No. 1: Don't panic.
In a recent interview with 1UP, Michael Morhaine, President and CEO of Blizzard, reassures fans that the Activision-Vivendi merger will not be affecting their game offerings in any way.
So in a nutshell, Vivendi announced earlier today that they're going to be taking a majority stake in Activision. They'll be injecting the Vivendi Games assets into the company, including Blizzard, and forming a new company called Activision Blizzard. When you look at Activision and Vivendi Games you see very complementary businesses. Activision has a great track record in console gaming, and Blizzard is the number one PC publisher and online game publisher. We're very excited about it. But the main thing you should know is that everybody involved is very respectful of the business that we've built at Blizzard--and we feel the same way about Activision. The Blizzard brand will continue as you've always known it, there will be no changes to that, and will still be under the same operating structure.
Read the whole interview at 1UP.com.