I'm generally fine with anything as long as we don't descend into full-on edgelord territory, honestly. XD Since a bit of darkness is fine (and one of the reasons why the original anime stood out at the time), but there's such a thing as too much.

Although if we're being more specific... It'd be really cool to do either something like Adventure (bunch of kids randomly thrown into a weird, mysterious alternate reality and having to figure out a way back) or Savers (having things run like an organization, basically) if that helps I guess?