The future game will have incest, but it's less central to the story in comparison to SL, because there'll be other fetishes to explore too. Sisterly Lust is very much concerned with boinking all of your family members, whereas the next project will focus on romancing various characters, adventuring in the galaxy and of course boinking a lot as well.
You will be able to name the protagonist (first name), but his face will be shown this time, in moderation of course. Not showing the MC's face really limits the camera angles one can use, I've experienced.
As for the end of SL, there'll be an epilogue, but I don't want it to be an afterthought, especially for the main characters.
Animations are often requested, but I need to think long and hard about that feature. As I mentioned earlier in this thread, I'm a terrible animator and those fuckers take an awful long time to pose and render. I'm looking at a second GPU to speed up rendering, so maybe that'll be the holy grail. But now promises, I'm afraid.