That's a considerable assumption, that Nintendo is stirring a cauldron cackling about what assholes they're being. Meanwhile, back in reality, they probably don't just phone up suppliers to see what they have around when it's time to move another million units. Ink is likely try on contracts for millions of the old style batteries and components, so even if Nintendo Super-Duper wanted to switch over completely to the new design there's going to be a supply chain lag.