By right i mean commentator boxes!
Assign a settler to it and they commentate the fight which is triggered by comparing hpbetween people fighting in the settlement. For example if you are low on hp "Looks like the Vault Dweller is struggling folks" (Fight lasting more than x amount of time) "So close folks, the anticipation is killing me..literally" This could possibly bring back Mad Dog too to FO4
Added possibility of them using companion names if they are involved in the fight.
Possibility of companions also being assigned and commentating.
I just think it would be awesome fighting a deathclaw (which i will do with only a sword, nornal clothes and jet) and have the vault tec rep commentate over the fight and he will be like "And we have a winner. He was certainly...prepared for the future!"
Also i want settlers to take their positions in seats near the arena i build. Perhaps a specially placable arena stand which basically commands settlers who are idle to stand and watch? They will cheer and clap and enjoy the fight. Even shout and cheer the name of the companions if they involved "Go on piper! Kick his ass"
Possibility to generate revenue by placing a beacon advertising a fight in which travellers will flock to your settlement. Speak to any spectator when they arrice to activate radiant quest which will basically prompt you to start a fight. They will watch, shop a little then leave if there is no action for a while until you retransmit the signal again after considerable cooldown period