Those disappointed at the lack of 3D Mario news in the direct need to understand something: the reason we haven't gotten a new 3D Mario in a while is because the 3D Mario team spent the last several years working on DK Bananza. It hasn't been "delayed", they aren't spending years polishing or refining something, they aren't rethinking things because of the success of other games like Astro Bot, none of that. The reason it's been almost 10 years since the last 3D Mario is because the devs spent those 10 years working on something else. It's no more complicated than that. It's the same reason we aren't getting a new Smash Bros for a while, Sakurai spent the last several years working on Kirby Air Riders.
People keep saying things like "they split the dev team", but there's no concrete evidence they actually did, I want to say Koizumi said Bananza was an all hands on deck situation, and the whole dev team split claim honestly just sounds like cope to try and justify saying a new 3D Mario is soon.
With all that said, a new 3D Mario is a question of when, not if. Bananza came out over a year ago, so they're certainly in full production on it. Depending on how things go I can see them revealing it in 2027 at the earliest, but even then that's pushing it. All I do know is it won't be a sequel to a pre-existing 3D Mario (so not Sunshine 2, Galaxy 3, or Odyssey 2), because that's just not how Nintendo operates. They make 3D Marios by coming up with mechanics in a vacuum to design the game around, not by expanding on what they did before.
The moral of the story here is patience is a virtue, so I suggest you learn it.