New characters and stories is not what the show needed. It was new writers. Heroes was real amateur hour when it came to the writing. They seemed to write themselves into corners constantly with their most powerful characters (Peter, Sylar) and had to come up with retarded new ways to keep them powerless or weak. If the same writing staff came back for this I don't have any faith in them not falling into the same cluster fuck they did the first time around that ultimately got the show shit canned.
They can't write a show like this without a clear idea of where they want to take it. Even the die hard fans lost patience with it. They would have even less room for error this time around.