I'd prefer a fully Supernatural focused EP for one reason: while GPs might be nice they'd also take absolutely forever to get released this way, besides Witches which would probably come first. Even if we still have ~2 years of TS4 content I'd rather not have to wait until 2021 for my occults.
However, there are some like robots and mermaids that I could see them including in packs not fully occult focused akin to Sims 3 Island Paradise and Into the Future, so long as they fit the content's theme.
Even though I like Witches more, I still think Mermaids are one of the occults to be really excited for. After all, even if you couldn't care any less, their addition would mean underwater exploration, diving and possibly sailing mechanics, something that cannot be replicated by mods/cc to the date. That is a big part of a life sim to me, considering how interactions with the ocean have played a tremendous role in our overall development as the human race. I mean, sailing and diving aside something as simple as going to the beach is still hugely popular and we don't have access to that currently in the game.
