While I'm definitely going to give this a chance, I'm not going to get my hopes up. Firefly was a perfect storm--it was the combination of Wheadon, Tim Minear, and the entire cast. Personally, I think the writing is what made Firefly work, and without Wheadon or Minear, I don't know if it will rise to the same level.

Moreover, I felt Serenity was a good conclusion to the original mythology (River, Alliance, etc.). If they introduce a new mythology arc, it might not quite have the same resonance. And if they just do a bunch of monster-of-the-week episodes, it won't be enough.

But I don't want to criticize what I haven't seen. They know way better than I do, and even if the only result of this is that the original actors have a lot of fun, then I'm all for it. They deserve to take a shot.