This is inevitable (since it also suspends production of other shows), but it still sucks. The fact that Heroes' creator is a member of WSG means that it is a foregone conclusion that this series will go on hiatus if the strike is immient. The last time WSG went on strike, it took 22 weeks before it was resolved, and I hope this time it won't be as long. Otherwise, many shows might be cancelled in the end, or the viewers will lose interest in those shows (particularly ones that have an ongoing storyline like Heroes), and it will spell doom for them after they return.
No matter what, this is a lose-lose situation for everyone involved, esp. the fans.