How do you follow up the huge success of the LittleBigPlanet franchise? No, not by making a go-karting game (though I hear it’s a ton of fun). You go and whip together a super-cool looking adventure game in a unique world worth visiting over and over, that’s how. Some online wags are making silly Paper Mario comparisons, but as they’ve not yet played the game, they’re to be taken as seriously as a slug fighting a tanker truck packed with salt. This one’s yet another very good reason to own a PlayStation 3, I say…