Hulst is CEO of the newly named Studio Business Group, which includes all of PlayStation’s first-party teams, plus covers the development of PlayStation IP onto other mediums, such as TV and film. Hulst was already head of PlayStation Studios. He was previously the co-founder of Horizon and Killzone developer Guerrilla Games, which was acquired by Sony in 2005.
Hideaki Nishino will lead the Platform Business Group, which includes console hardware, technology, accessories, PlayStation Network and third-party relations (covering major publishers and indie studios). He was already SVP of Platform Experiences. He’s been part of the Sony business since 2006, holding numerous roles at Sony Network Entertainment, Sony Corporation and SIE.
From the source:
So yeah, they already have more than one CEO, and it doesn’t sound like anyone is being replaced either.