Allen Adham is one of original founders of Silicon & Synapse (later named Blizzard) in 1991. Guessing his net worth, listed nominally at five million, is way off. Activision bought Blizzard for 19 billion in 2008.
Andrew Guerrero has been all through the industry: Yahoo, Sony, EA, finally Blizzard (last two years) as product manager.
Michael Vance is a twenty year vet at console software and with Activision for fourteen years.
Valentine Powell's background is mostly in web design and software, last credits Senior Software Engineer - World of Warcraft - UI team (Improving designer toolsets for ease of development).
From my three year experience at Activision, the company was slanted astronomical salary for top executives and thank you for being part of the gaming cult for everyone else. Makes sense from their corporate policy to remove humans more and more from games, except as consumers.