Carnival Cruise Lines to rename 'Carnival Destiny' as 'Carnival Sunshine' after US$155-million make-over. Among the new highlights is a new racing-themed water park featuring Carnival's longest water slide – 'WaterWorks' – with 40 different interactive water features, including a 300-gallon drenching bucket that will serve as the signature element of the SplashZone kids' water play area. Here, guests can race to the finish on Carnival's newest ride, Speedway Splash, with…