According to the latest report, the Switch version stand at 8.48 million. Combined with the WiiU version, it is over 10 million.

A quick top 5 of other games (Stand alone):

The Legend of Zelda: Ocarina of Time (N64) - 7.60 million
The Legend of Zelda: Twilight Princess (Wii) - 7.18 million
The Legend of Zelda (NES) - 6.51 million
The Legend of Zelda: Phantom Hourglass (DS) - 5.09 million
The Legend of Zelda: A Link to the Past (SNES) -  4.61 million

 
Pretty well done. Do you guys think BotW will go over the combined total of OoT?

Not only do I think it will, there's a good chance that the Switch version will do it all by itself!

yeah the game is still selling great, i could see it tacking on another few million easily over the next few years

Agree, It seems that Zelda BotW for Switch is going toward 15m. :D

Isn't it a also the best-selling of initial release versions-only? That really only applies to Twilight Princess, with the Gamecube and Wii versions. It's just shy of being higher than TP with the HD remaster, but it has a way to go to top Ocarina of Time + OoT3D.

Yes, but it not close to Ocarina of Time N64 + OoT3D.

12.81m, according to here. Maybe it's over 13m since 3DS does have digital. Still, I don't doubt Breath of the Wild will manage to pass it given its momentum up to this point. It's still regularly in the Top 10 and... has it ever fallen out of the Top 20?

It's great to see Nintendo taking chances with an established franchise paid off so well for them. It's such an awesome game

Zelda’s numbers are what impressed me the most on the quarterly results. It’s officially above Twilight Princess combined now. I’m impressed.