I don't know about arcade, but for story I would like to see (towards the end) Shang Tsung align himself with the only surviving members of the Forces of Light, Raiden and Liu Kang. Shang helps defeat Goro, Kintaro, and Shao Kahn. You think that you have just beat story mode when Shang turns against you. You must fight an endurance match against 5 forms of Shang Tsung using only Liu Kang and Raiden as a tag team. First Goro, Kintaro, Shao Kahn, Young Shang, then finally Old Shang. Some may say this is too hard, but I have said this once and I will say it again, "**** the casual fans!" Bring back the hardcore, ball-busting, controller throwing bosses that MK was once known for!