Reading an interview Heroes Execs (the great TV show that's on Mondays) has confirmed that one of my greatest fears about the show being another Lost or Prison Break will not happen, and the season will have a proper conclusion.
The creators compared Heroes more to 24 than to LOST, and said that each season will conclude in a way. “The first season will come to a conclusion,” Co-executive producer and comic book guru Jeph Loeb told the audience. “Next season will be a brand new adventure.”