The current installbase is not a negative to lifetime sales. That didn't stop MK7 and SM3DL from selling more lifetime than there were 3DS owners when they launched. The installbase will grow and legs are a thing which the first Splatoon showed the series very much has.
Also can't vote in your poll because 10+ million isn't an option. The way I see it, if other Wii U games that sold similarly to Splatoon had their 3DS installments break 10 million on a successful system (3D n 2D Mario), then Splatoon 2 should definitely do similarly on an even more successful system.







