Jax rework Idea

Was reading this story of Jax http://universe.leagueoflegends.com/en_GB/story/jax-color-story (if link doesnt work try just googling it or maybe copy pasting the link), which gave me an idea of what if they changed his ult so he actually pulled out a real weapon that gave him new abilities and a little bit of bonus stats perhaps that made him a beast at dueling for the duration of his ult. Kind of like a a Vayne ult where she switches to a crossbow only grants him new moves like mega Gnar or Jayce.