It will have great legs, and it probably cost next to nothing to develop, so it's already making money, I guess.
Another thing is the vocabulary you use. How can sales of 1.6M in the first 10 weeks be horrible? How is even 0.5M poor when the game had low costs? We do not have the production values of either games, so calling it poor or horrible is not possible because of lacking context.
Development cost and return on investment is not the point here. The point is that these games are supposed to drive hardware sales. Wii Sports did that brilliantly, so did Wii Play and Wii Fit. PS3 and X360 were loaded with top quality hardcore games and yet Wii sold better than any of those systems. Why? Because of Zelda? Because of Mario Galaxy? Because of SSB Brawl? No. Those experiences were already on previous generations and could only cater to a 20-30M clientele. The other 70-80M came from those "super-original" titles.
1.6M in the first 10 weeks is horrible because the market was already educated. It should have been 10M in that period so that the game could aspire to reach Wii Sports levels. It didn't, and it didn't drive hardware sales. The result? Nintendo went from hero to zero (from their best selling console - Wii - to their worst selling console - WiiU), presented losses for the first time in history and got crushed by the competition. That's not a success at all. That's a catastrophe.
1-2-Switch is even worse. Nintendo won't avoid another catastrophe this way. Is that enough context for you?
As the Switch userbase grows, so will the sales of 1-2 Switch.
I don't think so. Nintendo Land got surpassed by 4 Mario games and even Splatoon (launched 3 years after).
And also, the main hardware driver in the launch period was Zelda anyway.
That's the problem. Mario 64 was N64's best selling title, SSB Melee was GC's and MK8 was WiiU's. If Zelda turns out to be NS's, the console is screwed.
Prediction made in 14/01/2014 for 31/12/2020: PS4: 100M XOne: 70M WiiU: 25M
Prediction made in 01/04/2016 for 31/12/2020: PS4: 100M XOne: 50M WiiU: 18M
Prediction made in 15/04/2017 for 31/12/2020: PS4: 90M XOne: 40M WiiU: 15M Switch: 20M
Prediction made in 24/03/2018 for 31/12/2020: PS4: 110M XOne: 50M WiiU: 14M Switch: 65M