I'd like to see a Vex Raid on Mercury. Maybe diving a little bit more into Osiris lore. I also wouldn't mind a Cabal Raid exploring a little more of Mars. Like the Cabal empire sends in one of their main badasses to pick back up after the whole Taken invasion. Like maybe we could scale Olympus Mons or something. Summit showdown lol. As far as subclasses go, maybe something borderline evil. Like actual darkness. I mean that might be kinda like void? Idk.