My first one is originally posted by me one week ago.. but here we go again:

Shao Kahn's Tower

Its the tower from MK 3 wich u can see in the near background when u fight on the rooftop or the street!
It look very kool in my opinion and will be original to be made.
It will contain some really kool details since its Shao Kahn's.
Kool death traps and shit , i'll leave the mk team (if they look here) to develop the ideas for it , im just sharing the idea.



The second Arena that is in my mind is:

The factory where were produced the cybernetic kombatants
Cyrax,Sektor,Smoke or the new factory that was created by Sektor himself or the newest factory that will be created by Noob Saibot (see his ending)
the surrounding area:

U will see cyborgs in the background ready for activasion ,the machines that makes them will be working , the illumination will be NEON оr RED (infra red?) u can't see clearly the combatants beacouse of the light ,there will be Sparklings (im not sure thats the right word.correctme if im wrong) where the machines starts watering ,everithing will move and everithing will produce sound.

Hope u like the ideas i'll come later to add some more.
Now u can add your own or u can edit mine ideas as u wish