This may be sound stupid, but I am toying with the idea of creating a skirmish with a "Stranger Thing"-esque upside-down design. This will likely require at least 2 sets core tiles.
Build 2 of the same maps and then flip one over. Generally, this will mean forest spaces on one are desert on the other, and gleaming imperial hallways are old and rusty on the other. Maps will also be mirrored layouts.
Neutral tokens are portals between the 2 sides.
That is about as far as I have gotten. maybe being on corresponding spaces on each map has a positive or negative effect. Maybe damage to the character on one map heals the character on the flip-side. Or maybe they are just considered adjacent.
I've only given this about 5 minutes of thought, but think it could be fleshed out.