They should've made the mini's with more internal storage and internet connectable to a single storefront that allowed people to purchase more titles after the sale. Seriously, how hard could it have been?
I think we'll see a mini gameboy before an N64 because I don't think the appropriate SBC hardware is cheap enough yet. Maybe Nintendo has a bang up emulator that runs it perfect on current NES/SNES mini hardware, I dunno....
Oh, and make some extra controllers available for the SNES classic!