According to a story on Entertainment Weekly, NBC’s revamp of the Heroes franchise will include a prequel Web Series.
No release date has been set but the TV miniseries, introducing new characters to the Heroes universe, will air in 2015 sometime between now and then would be a good guess.
I, personally, really liked season 1, the first half of season 2, and most of season 4. The other episodes were ok but from what I have read, the writer’s strike that occurred just as season 2 was taking shape really hurt the series since it lost both momentum and some of the people who made that first season so fascinating to comic-book fans.