Russian IT magazine Computerra has published an interview with Sergey Orlovsky, the founder of Nival Interactive. In this interview also Heroes V development is mentioned, and we can learn the following:

1. The new game will bring a lot of innovations, but they will develop ideas found in earlier Heroes games.
2. JVC was offered to join the development process, but he refused.
3. Rob King is composing music for Heroes V.
4. A number of ex-3DO employees helped Nival with Heroes V development (although it isn not said exactly how).

Unfortunately, full text of the interview is not available in the net, yet.