Cartoon versions of He-Man, Teela, Orko, Man-at-Arms, and Cringer are teleported into the Berserk universe, while Guts, Casca, Shierke, Isidoro, Farnese, and Serpico are teleported into the world of Eternia... (Guts has his armor available, and both manga and anime feats are applicable.)
Each are faced with the typical enemies that the other usually faces - He-Man and co. take on the Emperor Ganishka, Zodd, and various Apostles/demons and try to take down the God Hand and Griffith, while Team Guts face off against the forces of Skeletor, Evil-Lynn, Mer-Man, etc.
How does each team fare in the other's world?