I mention alien dreamlands, but more so in terms of having tables, tools, guidance, etc. to customize Dreamlands however a Keeper sees fit - with extraterrestrial dreamlands as a flavor option, so to speak.
I was reading a Mythos-ish story by Fritz Leiber called "The Dreams of Albert Moreland" and wanted to model monsters off of the bizarre chess pieces in that story, which have various anatomies and carry stylized weapons. Could the monster creation rules in MM7th ed. model something like that?