I've read that the NX won't be BC so, that's why the will release the games on it. And most people didn't bought a WII U, but would be eager to get the game. So, NX will be the next opportunity for them.
Intel Core i7 8700K | 32 GB DDR 4 PC 3200 | ROG STRIX Z370-F Gaming | RTX 3090 FE| Crappy Monitor| HTC Vive Pro :3