A Jester's Serenade - An Abbott and Costello/Judy Garland Story Outline UPDATED

As a film buff, I have such an imagination and somewhere in an alternate timeline or a parallel universe there is a story that could've been a great idea for a movie or you imagined a cast of actors who would look great together on screen. For years, I always imagined what it would be like if Bud Abbott and Lou Costello teaming with Judy Garland would look like. It's such a shame that it never came to fruition. But then again they were under contract to different studios. Judy was under contract to MGM and Abbott and Costello were with Universal Pictures. However MGM signed a three-film contract with Bud and Lou to take advantage of a clause in their Universal contract that allowed them to do one film a year for another company. In reality, Bud and Lou did Rio Rita, Lost in a Harem and Abbott and Costello in Hollywood for MGM. But thanks with a little AI and a little bit of tweaking of my own, I did manage to scribble out a possible story that I thought would be kind of beneficial for both Judy Garland and Bud and Lou.
After many different attempts at a plot that would incorporate both Judy and Bud and Lou and taking into consideration the types of film Bud and Lou had done in their careers I thought the one type of film Bud and Lou never got the opportunity to tackle is a medieval set story. So I manage to concoct a story that would've been set in the medieval times. Now I know some of the aspects of the story I'm about to share with you may seem cliché by modern audiences but I'm writing this from the perspective of what 1940's audiences would've found unique at the time.
So this is the story I came up with.
I also added a romantic subplot with the Captain of the Guards and Melody.