Everyone was doing character rosters, so I decided to try my hand at a stage roster (Wii U version). It's rough and not terribly pretty to look at, but it is what it is:
No names, as is customary, and you're supposed to guess, I guess.
The images are more intended to show what I think they should be based on, not what the stages themselves would actually look like.
Though I will give you the answer to one of them, because it's just not possible to guess--dark green one with the tree on the bottom left of the main group is supposed to be a Fire Emblem countryside type thing, kind of a field battle version of Castle Siege. Not easy to get a picture that communicates this idea.
Maybe I'll do a 3DS one later.