A tech demo game, Mario Kart 9, Metroid Prime 4, some older IP as a surprise, maybe a 3D Mario and/or Pokemon
I say maybe a 3D Mario as I'm not sure how big the team overlap are with 2D Mario. Since Super Mario Wonder just released, a 3D Mario title might not be feasible in time for the release if there's too much overlap.
Pokemon tend to come only after a console established itself a bit, so I don't think it will be a release title. However, considering the technical difficulties with the previous iterations on the Switch, they might be more willing to move to a new platform quickly this time around.
As for why no Zelda, that's because the IP will celebrate 40 years in 2026, and I'm sure Nintendo wants to release something big for the celebration, like how they wanted to do with Breath of the Wild for it's 30th birthday (which had to be pushed back due to the Switch releasing too late to fit for the celebration)
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/
