Soundwave on 14 July 2016
My guess is SNES Mini for holiday 2017 or maybe right before. And then N64 follows in 2018 and so on and so forth.
If this becomes a big hit, I suspect Nintendo will also release full sized accurate retro models of all their consoles as well at collectors pricing. Hey, Nike makes an absolute fortune selling retro 80s/90s sneakers, that's all even young kids want (there's always a near riot whenever Nike re-releases the Air Jordan XI).
