I was not expecting a response after all this time. Though I can hardly blame you - work has me swamped as well.
You say that we need to show Nintendo that there is demand before they do anything for those franchises... but really, that's wishful thinking. Mother 3 basically became a meme in the Nintendo community because no matter how much fans ask for it, Nintendo just won't do it. Same for a new F-Zero. They either are unaware of fan demand because they aren't paying close enough attention to fans (K. Rool's pre-ballot popularity being an example) or they are aware and still won't do jack.
It's easy to say these games "blew it by not selling" when not all games are launched the same. Let's take a look at the three games supported by Operation Rainfall, for one. Xenoblade Chronicles, The Last Story and Pandora's Tower. One of these was
clearly better marketed and pushed compared to the others, so it's no wonder it was the one that had staying power - even though all three had demand and fan drive behind them.
And I don't think you're making a good comparison with the "old franchise vs new franchise" aspect. One look at the marketing campaign for Splatoon should tell you that while they did expect it to be a success, it was unprecedented even by their standards - an exception to their expectations, if you will. Believing that every new IP will do just as well is flat out bad management. Not every series needs to be the new Mario, so why would you expect a similar return from old series? Chibi-Robo never needed Mario's budget, but it needed
some degree of push and have its future depend on a game that was actually close to what its fans wanted rather than just a spinoff that plays in a different manner.
Heck, you say it yourself: pre-Awakening FE survived mostly on the good graces of Nintendo execs... even though it was heavily underperforming and was pretty much lined up for the same fate as other IPs. So why can't they do the same for other franchises, then? In fact, I think FE is a great example in this situation - it wasn't underperforming at the time for being outright
bad, just for not being pushed enough. The same can be applied to quite a few other Nintendo series out there.
I'm not saying Smash would suddenly make Golden Sun sell like Zelda, because that's just flat out absurd. But any bump in an otherwise inactive series is better than nothing. Sure, you can say that there isn't "evidence of tangible effects"... but isn't that also because we don't see it happening enough? I think it's weird when people say that "we can't risk backing this franchise" because their possible success is hypothetical when the very thought behind these franchises supposedly not selling is also based entirely on hypotheticals, if online support is anything to go by in some cases.
And yes, there are many other actions Nintendo could take to revitalize old IPs besides Smash... but this is a Newcomer thread in a Smash based forum and this whole discussion spawned because of the first party Brawl newcomers, so of course I'm gonna focus on that aspect during this conversation.
...All that said, I think we should take this on private, just because it's pretty much off-topic by this point. Good convos like this have become a rare sight, sadly.