As none had replied further on the other theory post, I decided to give it it's own thread.
To me the most important hints of fight night are:
- Button combination.
- Screens around the game.
In Arcade mode, when you you are in between matches, you find yourself at the screen where you travel from one character/stage to another.
Sometimes when I push some buttons, the music goes weird. Did I start off some button combination that leads somewhere?
If the last secret follows my theory, maybe more factors has to be kept in mind.
For example, you always have to try it between character 3 and 4, and other things like that.
Furthermore, I don't think diffeculty has a meaning, because it never had a meaning for any secret in MK.
And if you ask me, it won't be with the toasty/TYM. Wouldn't that be to obvious now that it's been used before? Kill me if the secret has to be found there.
If the secret is a character, then I would say it would be Sheeva. Because I clearly remembered that she was confirmed to be in the game. Or else Moloch, for the reasons other people have stated.
I hope the last secret is a feature that reflects the whole game, such as cloth ripping or some sort. Or something that adds up to gameplay.