tl;dr There is an official timeline, but we'll never see it.
Ahem. Yeah.
"we can't help but think about how those games connect to one another"
It's not "making the games connect". It's not "Let's make the story this way". No, it's simply the same theories you people are making, but by Nintendo employees. The people who make the damn games also have no idea how they should connect.
"I have the right as we're finalizing the game's story to then decide where it fits in."
Same as a guy going: "Hey, where would this fit? Yeah, sure, put it there, whatever."
Same as going WE DON'T GIVE A [parasitic bomb]. Nintendo has never given a [parasitic bomb], and this "official timeline" bullshit is given way too much importance by fans. If Nintendo doesn't release the "official" timeline, then it's something known by one or two people on a dev team. Then it's something they'll never show to fans. Thus non-endorsed by a company, and simply as a manner of making things fit in the mind of one of the many creators. It's the same as a guy fitting all of its theories on a Word document, going "Oh, this might fit here and there" after a story is made.
Then WHY call it official? It's not official in any way, because it hasn't even been released. If they don't want us to know how games fit together, then it's most likely they don't WANT US TO FIT THE GAMES TOGETHER. Why would they want to, if every single game starts the story all over again and every single game is a jump point for new players?
Stop reading between the lines and start enjoying each individual game for what it is. For all we know, the devs will have another interview next year stating something completely different, and this was all bullshit to begin with.