They'll just sit around counting their money and not releasing Bank.
Which is strange, considering that the Bank has a subscription fee (thus, would guarantee even more money). Then again, Nintendo itself thinks it's not necessary to release SNES/GBA games over the 3DS' eShop.
They must be allergic to money
"Many of you feel bad for this lamp...That is because you're crazy. It has no feelings! And the new one is much better." (IKEA's Lamp commercial)