Squad Tournaments?

Do some tournaments, like squad arena, but limit the character roster (faction? all female? the fallen? survivors? double agents?). Leave the battling open ended, not scheduled times with limited use. Turn on different omicron abilities from other modes, maybe Territory Wars one week, and Grand Arena the next. It wouldn’t require rewards; better put would be that I’d forego any rewards for just having the fun’ction. 

Idea for omicron themselves. Make them different colors for mode use? Pink for GA? Etc.