Nintendo testing the waters with Pokemon Pokopia and it selling phenomenally well, 2.2 million in 4 days. This has not broken the barrier and flooded the gates wide open for Nintendo to continue to push GKC onto their customers. 

I predict that slowly Nintendo will start moving more and more of their games over to Game Key Cards to the point were at the end of NS2 all major 1st party games will be on the GKC

Pokopia is technically a 2nd party game. So is mainline Pokemon, since Nintendo doesn't own Gamefreak. That doesn't give me much hope for Mario x Rabbids 3 though. Fuck key cards!

Not really a bold prediction, more of a lukewarm prediction. If not for the purpose of cutting down on costs, then to tackle piracy and to stop games from leaking prior to launch. Seeing as successful as Pokopia has been, the waters have been tested, and it seems all is well.

(I still stand by the claim that GKCs are an overblown nonsense issue, but that’s besides the point.)

With how things have gone at Ubisoft in recent years, I genuinely question whether there will be a M+R 3. SoH underperformed, and the lead director behind M+R games left Ubisoft not too long ago to work on Bradley the Badger.

It would be kinda surprising if this doesn't happen considering all the benefits of it for Nintendo so as mentioned it's not really that bold of a prediction. It's clear that only a tiny minority of people care enough about it to boycott over it so the only reason it won't happen is if in several years Nintendo still cares enough about proper physical media for the sake of it instead of doing the right business move. A bigger question is if the Switch 3 or whatever will even have physical games at all cause by 2033 physical will probably making up a low amount of game sales for them.

I think all Nintendo titles not developed internally will be Game Key Cards. Not confident to predict core Mario, Zelda, and game like that will be GKC by the end of Switch 2.

GKC is a terrible model. Somehow it combines the wrost part of digital games and physical.
The only 2 good sides:
1. You can resell.
2. In some cases, you can buy cheaper.

Not bold but just an accurate prediction. Most games are already GKC. Digital is growing, physical is dying.

The Helix and ps6 will not have physical games. Physical only gamers, in the next 5 years, will need to get over it or find a new hobby.