Sad to say, FAST Racing NEO seems to have sold less than 100k.
To proceed in the game everyone has to win Cobalt Cup in Subsonic League. So far the count is only 68388 ranked gamers (probably a wordlwide count, from what I have seen from screenshots).
This is for a relatively cheap game (~$20). That is still over $1M in revenue and maybe 0.5M in profit.
I think this does not bode well for the chance of a $60 F-Zero. I would be happy to see a new F-Zero but the market for futuristic racers is not very good these days.
Anyway, everyone that has bought FAST Racing NEO - support Shin'en and buy the upcoming DLC!