You were going through Shang Tsung's laboratory reason why you were here is because of a Shang Tsung from a different timeline AKA this one creating a version of Mileena that was enhanced so much she ended up killing Shang Tsung and invading your timeline but while you were walking through you started hearing gunshots you look and saw a anthro cat laughing like crazy while shooting Tarkatans made by Mileena

"HAHAHAHAHAHAHAHAHA!!"

It seemed like this person was a Tarkatan himself