The main problem is that Hitman reborn is an amazing anime and manga but sadly the anime ended before Inheritance Ceremony Arc. That should be solved with the creation of this last arc to be made into an anime to end the series. Doing this would really help the overwhelming amount of fans that would love to see probably the best fight in the whole series animated and brought out in all its color and action. Lastly, it would fill the gap between the ending of the anime and manga.