To be fair, we know more about the new sonic than we know about Nintendo's new console. I think what Nintendo will do is have a direct sometime this fall-winter and possibly announce the NX. And when they do, they will have a bunch of first party and third party games being shown in order to build up hype and get people excited. I think announcing NX too early before the expected release would just kill the hype due to the amount of time people would have to wait so its better for them to announce it closer to its release.
So I think they are making the right choice assuming its actually not ready.
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850