In 2015 NBC will air a 13 episode miniseries called Heroes Reborn, with different characters and a new story. If the network is actually committed to it beginning and ending all in one season, Heroes could be much better this time around. One of my biggest complaints with TV shows of that genre is when they keep throwing in excessive/unnecessary twists that bring up new questions, and then don't bother to answer any of the old ones (that's the main reason why I gave up on Lost halfway through the first season). It's as if they think the audience is too stupid and lacks the attention span to actually care about following through on plot lines.
But if the writers know from the beginning that they won't have to keep the show going, maybe this common trap can be avoided.