I'm pretty sure many of us would love to see an Uncharted Karting game, but since Naughty Dog is working hard on
The Last Of Us and probably also on a next Uncharted for the Playstation 4, (Orbis?) wouldn't Sony Bend be a good
developer for it, or maybe a developer who is known to make good racing games?
I think Sony Bend did a great job on Golden Abyss and might be a potential developer for an Uncharted Karting game. This way, Naughty Dog can spend their time continuing on their own projects without having to rush their amazing games.
I personally don't think that the Uncharted universe would translate well to a racing game, especially since Playstation already has other kart-style racing games, like ModNation and Little Big Planet Karting.