Friday Night Death Slot: Despite having this (and no advertising), it actually did very well in the ratings, thanks in no small part to Ellen DeGeneres promoting it on her show.
Screwed by the Network: Given no advertising, the aforementioned Friday Night Death Slot, yet managed to actually do well in the ratings, but was still not picked up by NBC.
What Could Have Been: If the series had been picked up, Bryan Fuller had a lot of ideas for the show, including:
Meeting members of the extended family, including Uncle Leslie (who Grandpa mentioned in the pilot).
There would have been a (presumably) Whole Episode Flashback where we went back in time to see how Grandpa and Lily were involved in the events of The Phantom of the Opera.
Further development of Lily's sister and their relationship, including how Lily came to adopt Marilyn.
According to a preview in Entertainment Weekly, there were plans for relatives based on the Creature from the Black Lagoon and The Invisible Man to appear had the show been picked up as a series.