When Robin Hood was escaping out of the burning castle he was wounded by arrows from everywhere so Little John takes him to the church to gets his wound mended by Maid Marrian. In that moment, Robin Hood realized how beautiful Maid Marrian was and how kind she was with him that he started to have some feelings for her. Minutes after, King John wanted to kill Robin because he wanted to end with Robin's "suffering" but King Richard interfered and along with Marrian put King John in place banished him from the castle. Later on Robin Hood will take King John's place as the new king after the dead of King Richards caused by ebola.
