Nah, with a userbase of 30 million and growing it'll find its audience. There are plenty of games getting released on XB1 all at the same time, yet those games still garner good sales.
I hope you're right, it's just that I hope Nintendo keeps Daemon X Machina as far away from Astral Chain as possible because it feels like those two audiences are going to overlap a bit. Still though, Nintendo couldn't move one of those games to late April/early May?
Speaking of Astral Chain, at first I thought it was a collaboration between Monolith Soft and Platinum Games with Monolith Soft handling the setting, overworld, character designs and story and Platinum Games taking care of the core gameplay.