For future maps, it would be awesome to have a map wich has 2 caged balls, like the pit that spawns boulder. Caged balls being indestrictable, it would allow for so many new moves and possibilities. I think 2 caged balls is a fair balance for it not being overpowered ( they are indestructible after all), while still giving alot of possibilities. They could spawn at the middle of the map, so player could initiate the fight by trying to rush them and grab them early to gain an advantage, but still risk getting punished on their way to the caged balls.
Idk I just think it would be really cool