FOX might have just had no good sci fi projects in the pipeline this year. The premises for the shows they didn't pick up to pilot didn't really sound very interesting as a TV series - a pandemic run amok, Punisher
adaptation, The Spectre
adaptation, and a cop teams up with outer space aliens living in LA (cue obvious joke).
The only one I would have liked to have seen was an adaptation of The Magicians
by Lev Grossman.