Many Wii titles crossed the 1m mark eventually it doesn't mean they were all viewed as worth while especially those games you mentioned here it's like saying Wiiplay is worth while. Many Wii consumers were new gamers so some happened to pick up those games over the coming months to see if anything other then TP was worth playing, only Red Steel sold really well at launch alongside TP and it didn't hold a candle to it after launch window as TP was the main flagship title that wasn't packed in.

Those 13 seconds actually got me pretty hyped.

The sales say there were several games offering an alternative to TP. It's success cannot be diminished as "there was nothing else worth buying". 

Pavolink and oniyide are right; TP sold as well as it did because that is was kind of game that non-fans can get on board with, the kind who scoff at toon graphics, as well as the fanbase who'd buy it either way.

No those sales were over a long period when people were looking for other things to play, in the same period TP sold around 4m and kept on selling while these games dropped off after it was established they weren't worth while and better games like Galaxy came along.

Non fans like PS3 and 360 fans didn't buy TP, Zelda was never geared towards their taste look at how poorly Zelda clones do on those platforms.

Non-fans did buy TP; Wind Waker and Skyward Sword show what the series sells when it only caters to the existing fanbase. To get more than that, it needs to reach beyond the people who would buy it either way, and those people don't want light-hearted cartoon games.

Bingo. I think your Xenoblade portion hit the nail on the head.

You're lying to yourself, non fans like those on 360 and PS3 didn't buy TP and the series never appealed to the tastes of that crowd, the reason for its sales was more geared towards the series' reputation and the Wii's momentum, new gamers came in and TP was the go to game for them. The Zelda fanbase itself is always at 9m or so consumers it's just a case of each game finding a balance to cater to most of them as each game changes.

It's nothing to do with cartoon visuals that's just downright BS as games like Borderlands sold well that's just you and Pav throwing your preference in, It's more down other factors. One of the largest factors is Japan, the region's shift away from console games as well as more unique tastes has had more of an impact then visuals, western sales have actually been very consistent.

If you think a toon Zelda can sell Ocarina/Twilight Princess numbers, you're in for a big disappointment when Zelda U's sales come back. (And any future entries that continue to shun mainstream preferences)

If the next Zelda is on NX I can see it reaching those sales regardless of visual style tbh but you're free to keep trying to convince otherwise.

You're setting yourself up for some major disappointment there. Only darker Zelda games have crossed the 7 million threshold (on a single platform, 8 million for multiplats) and it's going to stay that way.