Can someone...JUST increase the level of reflexion and explain me why I might be wrong here, vg sales stats are not always logical and linear, but still :

IF we had 5,07 M units sold on the WII U (13,6 M),
IF we consider that this new SMB could be the absolute best one, + Nintendo now understands and masters how to massively marketize their next big product.
IF we assume that the Switch will sell between 65 and 100 M+? (65-70 is my personnal estimation)
WHY can't we affirm now that SBU will not sell 25M minimum ?

Thats not how it works, attach ratio arent the same per console. If switch had same ratio as wiiu then a game like MK8D will sell close to 60-70mil for ex (if switch does 100mil)

You can only compare to similar install bases my friend

I can't imagine any truly bold prediction for the Wii U coming true, unless it was boldly pessimistic.  

A game doesn't have to sell over 10mil/etc to be bold

It does if it has clearly exceeded 10m before in the past like Mario Kart, 2D Mario etc....  If the games are good enough then they will move hardware.  Nothing on the Wii U was "good enough".

A "BOLD" prediction is one most people don't think will come true.

But are you saying Mario Kart 8 wasn't good enough? 

My splatoon predictions were definelty bold though. Are you telling me these werent bold?

1 splatoon will ship+digital over 1mil in a month

2 splatoon will sell 1mil+ in japan

3 splatoon will sell 4mil+ lifetime WW

Again we arent only talking about the big franchises

Average you mean hardcore player. The Switch had a strong first year, so the three next year can be strong thanks to the first year. The first year of a consoles is vital to its healthy survival in its life cycle. However, the console can not be abandoned like the Wii in five years, Nintendo needs to maintain steadly support until after the successor hits the market.

My prediction : 14.5-21 M LTD with digital sales

25m+, at first I questioned it but the more I think of it, the more it makes sense. I think what will roughly happen is: Zelda: Botw (15m+), Splatoon 2 (15m+) Mario Odyssey (20m+), Mariokart 8 Deluxe (25m+).
Also what will the sales be for New Super Mario Bros Switch, New Pokmon & Animal Crossing Switch. They have massive potential too.

If the switch continues to sell (Which I think it will for years to come), Smash Bros, Mariokart 8, Pokemon, New Super Mario Bros Switch & Animal Crossing will have the largest sales. Unless Nintendo comes up with an idea for new IP that takes on a larger audience, such as Wii Series, or something along those lines (Like the Labo experiment, but successful).

I wished more people would acknowledge Bayonetta series, Metroid series & Xenoblade series. Also Fire Emblem's sales were biggest that it has ever been on 3DS and I hope it's momentum also translates to the Fire Emblem switch too.
I hope Metroid Prime 4 sells more than it's ever done, and I think there's a large possibility of that now that Metroid Prime series is a sacred classic that gamers still talk about today. They will be gamers out there who have never played it because they were too young at the time, now they are older I think the sales of Metroid have even more potential than in the past.

That's a good point.  I'll give you those Splatoon predictions, since the game was a big unknown on the Wii U. 

Consoles don't need constant first party support if they have strong third party support.  Switch will have 3rd party support that is better than the 3DS, a system which is still selling even during it's eighth year on the market now.