2010's stage submission:
Nuketown, USA is one of playable maps in Call of Duty games, released by Activision since 2003 and it became very popular franchise since it's beginning. This map debuted in 2010 game CoD: Black Ops, so it counts as a 2010's stage.
Nuketown is a small town as the name implies, where it locates near area, where atomic bombs are sent there and explode into mushroom cloud.
The map debuted in in Call of Duty Black Ops, made by Treyarch and published by Activision and it later appeared in Call of Duty mobile.
Nuketown was so popular that was remade into multiple versions of it like
Nuketown (Black Ops 4),
Nuketown 2025,
Nuk3town and
Nuketown '84.
The layout of the stage would be walk-off arena with houses' walls as stage's walls. The rooftops of the building would serve as platform that you could jump on. They're soft platforms that appear on this stage. Meanwhile the school bus and truck would also serve as solid platforms on this stage (They can't be destroyed).
(The stage would be based on OG Nuketown)
Wait! There's more about the stage, the hazards! Yup, that's right. The hazards are gonna be soldiers, who run around the stage and shoot at the foreground, damaging players or Assist Trophies when they're around. Some of them run the foreground (You can defeat them though) and some of them are in background (Which you can't harm them). They appear for while and they go away.
Also the nuke would appear in background, but it doesn't harm anyone, since it's explosion would be far away from the town.
Also we see Captain Price, Ghost, Richtofen and Frank Woods as cameos in the game, standing on the stage in background.
If you turn-off the hazards, the soldiers won't appear after all.
The FD and Battlefield forms take place over the Nuketown on floating platform.
The Omega form is like FD, but Cod themed.
The battlefield form would be like FD, but it has three platforms that he roof textures on it.
I nominate Nuketown as unrepresented stage based on popular video game series, because Call of Duty while controversial for little bit is one of most iconic FPS games of all time and it should get a representation in smash, since it's a big franchise (that is milked by devs) and it's one of Activision franchises that should be represented in game.
Also since we won't possibly get a CoD fighter, then we could get a stage instead.
Call of Duty should get a representation in Console wars at least.