I'm guessing all these shows are connected o,o<<< yup. Alex is friends with the people behind R&M, SVTFOE, and Steven Universe, and he's said before that he knows about all their little references that they include in their shows. And he said that he's also included some minor references to those shows, too
Adventure Time Theories. This cannot be true because of the mo factory episode. Because mo himself sent bmo out on his own because he was "special" was because bmo included parts from an ordinary boy who loved video games. In the episode with the mo factory, while mo repaired him, inside bmo was a golden heart shape that technology now does not include.