The Disney Parks Blog has revealed the complete roster of characters who will be on board for the Marvel Day at Sea on upcoming Disney cruises. Black Widow and Hawkeye will join this epic event, assembling with nearly a dozen others from the Marvel Universe, including Black Panther and Loki who will make their very first appearance as part of a Disney vacation experience. The event also marks the first official appearance of Iron Man, Star-Lord, Gamora and Groot on a Disney Cruise Line ship. Rounding out the roster of Marvel Super Heroes that will be onboard are Spider-Man, Captain America, Thor and Doctor Strange.