I doubt it. Even though Nintendo has always tried to make Zelda as intuitive as possible, I think that the type of game it is appeals to a somewhat limited audience compared to something like Call of Duty or Grand Theft Auto. I think a lot of the gamers who play those games wouldn't have the patience for something like Zelda. Also, how often do you see games on the market like Zelda? They don't appear that often and I think it's because it's seen as a risk. Those games aren't exactly cheap to make and are not going to get 10 million in sales and beyond.

Zelda is in a unique situation. It's an adventure/action game that does have a limited audience but still have more mainstream appeal than even more niche games like Shenmue.

If it went multiplat yes. If OoT could not do it on N64 and TP could not do it on Wii then I doubt it ever will as a Nintendo console exclusive.

It's not like Twilight Princess sold badly, at 7.1m it's just 500k under Ocarina of Time. Including the GC version at 1.6m it's a total of 8.7m. I doubt it would have sold any better if they called it: "The Legend of Zelda: Shadow of the Wolf" or something instead. Especially since it seems Zelda sales aren't that heavily dependant on install-base. Most average around 5m regardless of platform, with only the two that released extremely late in their console's cycle clearly under.

As for 10m sellers I hoped A Link Between Worlds would have finally be the one that had a good chance. Not because it's good enough to deserve it, but ater New Super Mario Bros.' success, I hoped having a retro-style Zelda would have a similar effect. Even when VGC undertracks this game by like a million units, it didn't appear to be that people were really waiting for an old-school Zelda after-all. Especially comparing it to the sales of Ocarina 3D, which are nearing 4m, it seems clear what people want. Hopefully Zelda U can deliver.

To sell 10m, they probably need a Ocarina/Twilight Princess-style game that boasts modern gameplay elements with great graphics that aren't held back in any department in big worlds and surround it with tremendous hype to have a chance. On a userbase that's big enough, at least over 30m at the end of that system's life, and be released during that system's peak. They would also need a bit of luck. I hope it happens someday.

who cares about sales, aslong as they keep doing good zelda games im fine

If it was bundled with all wiiu since gen beggining it would be really close to achieve. If they do it with nx i think it will come short.

If we consider mobile Zelda games, then yes. But I don't think anyone here actually counts that as a proper game.

So I see three options for a Zelda game to hit 10m+. First we must asume it's a GREAT game with high review scores, it's not hampered by either quirky gimmicks or an experimental art syle and that its made with an older audiens in mind.

1) Nintendo has another huge console hit like the Wii
2) The Fusion is a reality and reaches a big install base, similar or greater than that of Wii
3) Nintendo goes 3rd party

Only if it's not exclusive to a Nintendo platform.

Yes, on a big installbase, with an artstyle similar to Twilight Princess, great graphics and be acclaimed as th ebest game ever.

Without sales they will stop doing it?

Games are not made by thin air but money.

Sure it can.
I will happen when Nintendo goes 3rd party and they make a multiplatform home console Zelda game for PlayStation and Xbox...

So basically, never. :P