Well then you're wrong the other way, because Lucas' later films were just as successful as his older ones, at least from a financial standpoint. So either way it's a bad analogy.
Also, comparing SMB and OoT that way is ridiculous, as they came out in completely different situations. You could make a good argument that no game has ever or realistically will ever be as successful as Super Mario Bros. was, and that's almost entirely because of the environment it came about in.