Back in the day I used to play an obscure FPS game called “Counterstrike”. Anyway, it had custom maps, some of which were designed as a giant kids room. Like, you were the size of the toys from Toy Story and had to play around over sized objects.
I remember if you went under the kids bed there were Xena magazines.
Anyway, I think this would be a fun thing to do with Overwatch and suit hero skins like Lego Bastion. Blizz could even use their connections with Lego to have some Lego structures built in the middle of the room for players to play around.
I think it would require a skilled designer to not just make a big empty room. You’d need clutter, like a messy room but with high points like tables and such.
A nice seasonal or arcade map would be cool. Like an Xmas map where toys are fighting over a payload of cookies around a decorated tree and fireplace. Could have a toy train set up as a hazard. Respawn could be from open presents scattered about the room, or a mouse hole in the wall. If not Xmas, then just a normal toy room map.