So sorry this has happened to you. It's cruel & uncalled for.
I would walk in with my head held high, ignore them.
Don't engage in any past history (this summer) or any negative/nasty confrontations they may try to start. Try not to act intimidated when you see them, just ignore.

I know you guys hate to do this but if you feel threatened AT ALL please tell one of your teachers, guidance counselor, principal, school nurse, anyone that you trust to help you with this. Do your parents know about this? You could call one or both of them if they pull this stuff at school. This is bullying!!!!

Take care of yourself.