My takes:
1) The Slayer: Could be good, if done right, and I think you could very well do it right. As long as combat with demon girls doesn't involve "battle fucking"... which has got to be hands-down one of the worst tropes of Japanese hentai. A variety of cute monster girls would be fun as long as they don't get too furry or inhuman looking; accessories are OK but please stay away from anthro and furrier concepts. Like no less than 90% human. Of course there are those who like those, but it's a very niche kink with little overlap with the teen stuff which will draw most of the players.
2) Camp Tomahawk: Please tread carefully with the non-con/dub-con/coercion/reluctant themes in this one. You kind of sidestepped the issue during The Fosters by making the sexual abuse into fragmented, drugged memories that were basically unfappable. Which was fine because we had plenty of teens to fuck. If you actually portray the counselors seducing and abusing the campers, you'll have to walk a line between accurately portraying the wrongness of the acts...and making the portrayal of the acts fappable. Malignant is an excellent example of how to do this; Deaufosse makes even the "nice" path creepy yet hot, and the dark path...if that doesn't lead you to a dark post-nut clarity of the soul, then you may have no soul. Not sure I'm on board with the killer angle though, or at least with playing as the killer.
3) Tales of Fairies and Fantasies: The anthology angle is bound to keep things fresh, but it will also prevent any real development of a storyline. Not bad as a palate cleanser (for you) if your main project is intensely plotted, but most of the players who subscribe to your main games likely prefer a plotline with character development and progression of lewds. But there's nothing wrong with a creative take on an old classic tale with added sex, either. If you pursue this, don't just stick to the old Western classics; there's a whole world out there with interesting stories, and not all of them are as natively prudish as the standards we grew up with (though even many of those have become sanitized over time). Also could run into problems like The Slayer if you get too close to furry and bestiality which will turn a lot of players off.
4) Bangtown City: Could get unwieldy with too many choices of who to fuck, or not fuck. Not having a story in mind may mean you might want to back-burner this one for a bit and let it simmer. Plus I'm historically not terribly fond of teen/20s MCs (with rare exception).
5) My Daughter, My Wingman: Rises to the top of the heap for me simply due to daughtercon and young teen content. Not sure how you would do the two MC thing though. Most (male) players prefer playing as a male MC, and one with a bit more agency than waiting for his daughter to feed him another of her friends. And if we identify with the daughter at all, we aren't going to be happy about her crying herself to sleep as daddy deep-dicks yet another of her little friends. Also, you may want to make sure you don't tread too closely to the story of the (sadly abandoned) game "My Sister's Devious Plot" which this concept already resembles.
6) Aunt Farm: Cute name. I like both aunts presented so far; Aunt Anna reminds me a bit of Heather from Our Island, probably just because she is a bit of a thicc lass, and Aunt Lily is super cute and seems like she might be younger than the MC (not impossible if the grandcestors stayed frisky into their late 40s or older, and grandma had a perimenopausal "surprise" pregnancy). But again, the youth of the MC works against this game, in my opinion (which is not shared by a majority of gamers). But for the love of all that is holy, keep the GILFcest optional. Not all of us want to see an old lady naked, no matter how well preserved.
Summary and tl;dr: So my vote among the games presented goes to My Daughter, My Wingman almost by default. The Slayer takes the #2 slot with the recommendation that you build up the romance with the mother and daughter and don't overwhelm us with too much casual monster girl/daeva pussy. Camp Tomahawk and Aunt Farm take up the second tier of recommendations, if you can get the balance right on the nefariousness/fappability of the former and for the latter, either make us care about the aunts or just go full nukige and just bury us in auntcest pussy. Finally, Tales of Fairies and Fantasies and Bangtown City just don't really excite me that much, though I think they can be made to work if you can firm up the concepts and the approaches you want to use.
Good luck!
