1 Month? I don't think so. Why?
Because Its stuck between The Witcher 3 and Batman AK + The fact that for some reason Nintendo only users are still getting grasp on how online gaming works and may not be interested in a game that relies so much on it.
With that being said, if this game had actually the exact same set up BUT it was called Mario Paintball (with Nintendo Characters) it will sell 5 million copies in 1 year easily. The attachment ratio for Mario games is just ridiculous