Should i call this kid out?

So i was with my friend watching a fight after school. It was my friends little brother who was fighting. One of the seniors who were basically the moderator stepped in WHILE they were fighting and started hitting my friend's brother. My friend jumped in to stop it, so i jumped in. The moderator's little bro jumped in front of me and shoved me trying to be tough. I shoved him and he swung at me. I ducked it and hit him. His brother than sucker punches me when his bro started the shoving, AND HE HIMSELF STARTED THE ***** FIGHTING. This moderator, however, has the back of almost the entire school while i have farrr less. I want to call him out to prove to him that i could kick his *** (i can). I just don't have enough friends to support me in case he pulls something (he prob will). What should i do?