I still believe that he's just keeping it a secret. My theory I posted was:
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But if he is wearing the blue clothes in flashback then that leads credence to my other crazy theory: That the real Link, whether its OOT Link or not, really did die in flashbacks. And you are just a random person who sees it happen and/or picks up the Master Sword after the real Link dies. Thas why the Master Sword is rusted, because you aren't Link and its rejecting you.
To go with another theory of playable girl Link, and this has my bias because its my dream, especially in such a huge world as this. At the begining of the game, the person who picks up the sword after Link dies is randomized, atleast between the "Link" we see and the "Zelda". And thats the biggest secret that Anouma has been hiding but subtly hinting at. From the "that may not be Link" at E3 2014 to even pointing out the similarites of Link and Zelda's design on the Switch Treehouse. And as someone thats dreamed about this moment, I have to ask, why do they look so similar? Link and Zelda have NEVER looked so similar to each other, its really similar. If they had showed "Zelda" in the trailer with the same clothes but with sword/shield everyone would immediately go "female Link???" but everyone seems to be ignoring their similarities. In what we believe to be "present" scenes from the trailer she even has Link's trademark sideburns, which she doesn't have in any scene when she's not wearing the blue clothes. If my theory is true these two could easily be siblings where one is put to sleep 100 years to infuse "Courage" and the other "Wisdom" and stories roles are reversed depending on what character you get. Can you imagine starting the game, it saying "Wake up Link" and then a girl wakes up? You'd wonder if your high or something at that point lol.
But Anouma does listen very carefully to fans so he knows at this point people want a playable girl Link. So this could be his way of doing it without actually making a girl Link and ruining his idea of Link. I can even see text from a future game saying "remember that story of BOTW? How did it go? The boy in blue saved the world...or was it the girl in blue? The ancient texts seem to tell the story differently from different sources." (Of course this means she'd likely never show up in another game, but if any game needs a girl Link its this one! RIP in piece girl Link in Smash.)
The end of the game would be completing the previous Link's quest and if OOT, creating the two successful timelines.
Theres just too many similarities between Link's new design and Zelda's new design that I really can't help but to feel like something like this will play out.
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Him pointing out how similar Link and Zelda's clothes are and then immediately moving on in Amiibo treehouse part pretty much sealed the deal. There is a reason why we aren't wearing the green tunic, because we don't play as Link. Someone put us into the chamber to try and mold us to be Link, to give hope to the survivors. And when you start a new game your character either randomly generates between the "Link" and "Zelda" characters, with the other character being a NPC thats swapped depending on which character you pick, or its even more randomly generated possibly between different species. But it'll probably be just the two characters we see.
But there has to be a option to play as girl Link from the beginning to end. To many subtle hints. But we'll likely have until March 3rd to know for sure.