Development Hell: Around Black Cat's finale in 2006, author Kentaro Yabuki expressed intentions to create a sequel series. However, in 2009 Yabuki had a Creator Breakdown in the form of a troubled divorce turned legal battle over his work in To Love-Ru (so messy that it forced Yabuki and co-author Saki Hasemi to end said series) and he has not written a long manga series since.
Reality Subtext: At the end of Venom Inc., Eddie Brock tells Felicia Hardy to stop being some sort of criminal mastermind, that being a hero suited her better. Hardy's FaceHeel Turn was never popular with fans at all and blamed Dan Slott for ruining a character.
Her original storyline, which had many plot points coming together that were dropped suddenly when the writer left the series, was going to end with her death as a J. Jonah Jameson who had lost his mind gunned her down.