Shares of Activision Blizzard (NASDAQ: ATVI) hit a five-year high today. The company behind best-selling video games like Call of Duty and World of Warcraft are buying nearly $6B worth of shares from majority owner Vivendi. In the lead story on Investor Beat, Motley Fool analysts Ron Gross and Charly Travers examine what the deal means for Activision, whether competitors like Sony (SONY 0.69%) and Electronic Arts (EA 1.65%) should be scared, and why investors may have already missed the boat.