This isn't a rumor, just a thing I thought would be cool in Zelda but know they're definetly not doing.
Anywho, as you know there's a big push, and rumor for a female Link in the game, or at least being choose to play as one. The female Link argument is one I was never interested in so I won't delve too much into it, simply put I don't really care either way, however I thought of what would be an interesting way to have a female playable character but without really changing Link's gender.
While I agree that on games were you're supposed to project yourself as the main character, such as Pokémon or some Dragon Quest games, being able to choose the gender of your main character is important, however, at the same time I don't think changing the gender of a character with 30 years of history is a good idea either.
So I thought of the super original idea of, make a new female character and make it playable. I know your mind was blown at that super original thought, but hear me on how it could be implemented.
Think of 3 games, Pokémon Emerald, Resident Evil 0 and Grand Theft Auto V.
As you may know Pokémon introduced a female playable character in Crystal, but didn't make it interesting until Ruby/Sapphire (I haven't played either which is why I mention Emerald) on those games you get to pick your character at the beggining, a boy or a girl, same as Crystal, however unlike Crystal the character you don't pick is still in the game, playing a role in the story, such has been the case with all Pokémon games released afterwards. That would be the idea, you pick your hero based on gender, but the other character still serves purpose in the world.
Now through RE0, the interesting mechanic about that game is playing as two characters as one, and being able to switch between both at any given time (mostly), so we could do something similar with that, of course in a much more open manner. Playing as two heroes at once could also change the way the game could be structured, here's a thought, Link remains a silent protagonist, however the female character does speak with others, she interacts through the world more directly than Link would.
Finally GTAV, and here everything comes together. Now I haven't actually played GTAV so I can't comment on how well this works personally, this is based simply on how I've read the game works. In GTAV there are 3 protagonist from which you can switch to play at any time, similar to RE0, however here each character can act independetly, as you are playing as one character the other one could be doing some other business somewhere else in the world. Now bringing everything full circle.
You play as two heroes from oposites genres, you may choose to switch between the heroes as you play, or not and you can play as just the one for the entire game as the other one plays a supporting role in the story, however the other hero still exists in the game world and you could just bump into him/her as she/he is just making his/her way around, the other character could also complete "mini dungeons" or sidequest without the main character ever knowing.
At the same time the other character could be controlled by another player bringing multiplayer into the series, but just as switching characters it would be optional, to accomodate this there could be mini dungeons, or areas in larger dungeons where cooperation would neccesary to advance, but these would be interely optional that way the game is designed for single player without compromising too much and it adds multiplayer as well.
I won't say how Zelda should be like Dark Souls because I've yet to play a souls game, or how it should be like Skyrim because I've never played a Bethesda game.
Hopefully all of this makes sense, please excuse spelling mistakes.