If it were possible for them to force the prisoners they take to fight in the arena, I think that would be cool. Could watch them fight the arena gladiators or choose to fight them yourself by talking to say.. Rat or Zoey.

Animal gladiators. Maybe even security spiders, iron spiders, crimpers, etc.

Gurglers and Fogmen.

More gladiator "squads" for fighting multiple opponents, much like Master Blaster. Perhaps there could be melee mixed with ranged teams and/or animals.

More gladiators in general, even if at similar levels to the ones currently implemented. As sometimes waiting for the cooldown to challenge again can be a slight inconvenience.

Should add a shek with a frag axe since we're sitting in Squin's backyard.

Tora the Fearless stats ideally with enough strength to actually swing once a year.