Do you read every word of every clause of every EULA or licensing agreement you agree to?
I really can't tell if you are serious anymore. We are talking about a multi billion buisness here (even back then), this is not about some end user software. Lawyers and tons of people were involved.
It would be great if we did have the text, and Nintendo's explanation for how they didn't reject the contract back before it was first signed, but famously reticent Nintendo has, as you might expect, never shared either one. It is kind of annoying, they could have made the whole issue go away if they'd just explained the whole situation... but I don't think they did.
Or maybe they have no interest at all because it would make them look really bad. You make it sound like it's a fact that Nintendo oversaw that one part in the deal, The only actual FACT we have is that Nintendo signed it. You sound like someone who wants to defend Nintendo at all cost...
Here's my take. Nintendo saw the PC Engine and Mega Drive CD add ons fail, and lost interest in the SNES CD-ROM, and that backstab was Yamauchis ugly way to shut the project down. If they really had wanted to produce a SNES CD, they would have. But that's just my feeling, I don't say that's a fact.
And by the way, thanks for introducing me to Sega Saturn emulation. From what I've seen it runs very fine. Now if only one could adjust resolutions...