What if the developers incorporated elements of rumors from the Original games.
For example, The forest arena in MK3 where the Trees had faces. It was rumored that if you did a certain button combo that you would go into the tree for a different area.
I am sure that there are many others that could be used.
YEAH!!! I remember when they rumored a red ninja called "Erbucle" or something kind of like that! Same with brutalities! since mk2 I heard that if you touch i dont know what, stand on your hands, and sit on the jnoystick, u could do a brutality