The thing with FOX network is that they have 2-3 series that "live" through more than a season. Stuff like the Simpsons that's never gonna get cancelled until someone dies or retires or the series really goes to shit - this season has been the best in the last decade IMHO.
But they tend to cancel anything decent within half a season or so. But watch them keep those two on for two seasons just so spite Firefly fans lol.