superchunk on 25 January 2017
The Joycons do everything a wiimote did, but better. So if the do add a digital-only backwards compatability (which if you read between the lines, makes sense) then joycons can fill the controller barrier.
The absence of a light bar in the Switch, to me, confirms that wiimotes, etc are simply not in the equation. Even the gamepad had a built-in light bar. The joycon doesn't require a light bar to function its IR in a superior method.
I do think the balance board would be available and possibly a wiiu pro controller (knowing it loses support for nfc/motion/hdrumble). But, even MSony don't support their prev gen controllers even though they are virtually identical in functionality/buttons.
