Unless anyone here has a lot of money to share with Nintendo AND Rare AND anyone else affiliated with JB and/or GE64, I don't think we can get it Steam-supported. Copyright laws are a sticky business.
Fixed. These kind of things are always about money.
If M$ and Nintendo would have found an agreement on the XBLA version of GE64, it would have been because M$ offering more money.
Having good relationships to the licence holders doesn't mean anything, because friendship ends whenever money is involved.