Not getting my hopes up, i'm just gonna assume it's the Game Boy game since that one's never been made available digitally.
To be honest, i've waited so long for a new one... but I hold WR64 in such high esteem, i'm not sure they've got what it takes to match it these days. Feel the same about a new F-Zero.
It'll all depend on the feel of cutting through the water, that's where Blue Storm fell short the most. Like Daytona 3, i'd almost prefer them to take the physics from 64 wholesale, but knowing Nintendo they'd recreate them from scratch. I'll be very sceptical if it's anyone but EAD/EPD themselves making it.