You will have an uphill battle with that one.
No one else with a complete SNES set has this so you will have to fight public opinion. For that reason alone, it is automatically a "prototype" to everyone else.
My point was that no matter what was discovered it wouldn't carry much weight towards the masses in adding a new title to the SNES library. It is like adding a new book to the bible or an amendment to the constitution. For better or for worse people are accustomed to things just the way they are and you won't get a change without a fight on your hands.
Finds like this are awesome and I guess it bothers me when people automatically attach the prototype label when they see something new. Some refuse to be interested in the origin of such games on this basis alone. Perhaps playing devil's advocate a bit but I'd like to see people think these things out for themselves instead of just checking it against a list that they didn't write. The hobby is so much more interesting if each game is looked at individually instead of lumping them into a category.
I'm guilty of it myself as I lose interest in any game not sold in the USA. It was an early self defense mechanism used to keep my spending to a minimum. A goal that has failed horribly.