Hey, most tfs intended in the future are other species/mythical creatures, although I do plan on implementing tfs that are highly requested. One thing to note is that tfs that change body shape are a bit more complicated due top the way I do the sprite system overlays, so those will require a bit more thought and time. So to answer your question, weight gain and hourglass- possible but unlikely, feminization - well all charachters are females but if you mean making them bimbo like yes, other species - yes