Most likely, this has already been suggested, but I did not see this proposal. If there is an opportunity to create an arena and fight again with those who were defeated in the story, it would be great. And the ability to buy weapons that fell from them.
Will there also be a boss rush challenge mode you can go to, like an arena, so you can fight all the bosses in random order, without breaks and being timed, so you can improve how quickly you defeated them?
Sort of like Devil May Cry bloody palace, Bayonetta witch trial challenges or Metroid Dread's boss rush mode.