BotW 2 was announced in 2019, with a video of the in game graphics, and is releasing in 2023... Prime 4 literally has nothing to show for itself. Fingers crossed I am crazy and you are right.
BotW2 started out as a DLC pack. They already had the engine, the main map, etc. The movies we saw for that well could have been what was intended for the DLC the entire time. And look, that game isn't even releasing until this year. I'm not going to say you're crazy, but this example isn't a good one. Metroid Prime 4 literally had to start from scratch. In 2019 all Retro had shown Nintendo was a prototype.