I think some of the key supernaturals (witches, werewolves, fairies/elves) could benefit from having a dedicated game pack. Others, like mermaids, genies, etc. where there's not a lot of specific lore would be fine with being included in a pack that focuses on other themes (mermaids in a tropical vacation pack, for example). Robots are sort of a quasi-occult, like aliens; I'm not sure they need their own pack but they need to be well thought out and fleshed out if part of another pack (like maybe a Hobbies GP that adds Robotics and other pastimes).
