9. King Arthur
One of the more perplexing entries on this list, King Arthur was set to become a cinematic universe off the back of the Guy Ritchie movie King Arthur: Legend of the Sword. The plan was to have movies centered around characters from Arthurian legend, such as Merlin and Lancelot. Up to six movies were planed in this would-be cinematic universe.
Warner Bros. saw great potential in the endeavor and gave Ritchie’s film a massive budget of around $175 million, not including marketing. This ginormous budget seems insane in retrospect, but seeing the success of the MCU, Warner Bros. were keen to not just have the DC Extended Universe under their belt.
The project, however, was a colossal failure. With the movie grossing just $148.7 million at the worldwide box office, and faced with a
poor critical reception, the whole project was forced to be put on
indefinite hold. Looking back, this does seem like an obvious misstep from WB,
with no one clambering for a King Arthur cinematic universe.