What genres/pieces of speculative fiction am I missing for my conglomerate world?

I have a developing world I'm calling 'History Conglomerate'. It's a sort of alternate Earth where popular ages of history are thrown together with each having a strange element added to them. I have covered most of the world, but I'm stuck coming up with strange elements for 3 more areas. Here is what I have so far.

• North America has Native Indians, but they have access to several kinds of mech suits that they pair with usual weapons like bows and spears.

• South America also has Natives, they have a cowboy/Western theme that mixes with their natural environment, e.g. trains and horses effortlessly going through jungle.

• The Caribbean has Ninja Pirates, based on the Pirates vs Ninjas trope.

• Japan has Pirate Ninjas, same as above.

• The Roman Empire exists, but they are pyromaniacs using modern flame and explosive weaponry.

• Upper Europe has historical knights, but they have a scifi element with laser-edged swords and laser shooting crossbows.

• The Middle East has cyborgs.

• China is a steampunk nation.

• Australia is full of criminal dinosaurs, e.g. the mob and gangsters.

• Antarctica has modern warfare penguins.

Only Africa, India, and Russia are left. I've been browsing genres and other areas, but I'm still stuck since I'm trying to make these factions somewhat equal. Any advice or recommendations are welcome. The only rule I have is no magical elements. If anyone comes up with a good example I could add you to my world outline in case I ever decide to do something with this world.