Earlier today on the official website of Mortal Kombat vs. DC Universe, three renders featuring arenas previously announced were unveiled!

First is Superman's base of operations, the arctic Fortress of Solitude. The fighting space seems to be circular in nature. Second is the dark and murky Gotham City Streets, complete with police vehicles. Finally, the Special Forces' Base of operations. In this render, we can see exactly where the fighters will be located as there are models placed in the image.

Thanks to forum member for the lead on this story!