This excerpt taken from the ATVI DEFA14A filed Dec 11, 2007.
7. Will Vivendi have control over operating decisions, such as investments, development plans, staffing?
When the transaction is closed, Vivendi will be a majority shareholder and will have six seats on the Activision Blizzard Board of Directors. Through these relationships, Vivendi, through its board representatives, will participate in strategic decisions, such as acquisition plans, compensation plan design and annual financial target setting.
Activisions Board of Directors does not get involved in operational decisions such as development plans or staffing.