The flashforwards were basically spent setting up Mia as the next GA. Her hero’s journey parallels Oliver’s (trained by a member of the LoA, lived a gritty life away from home to “toughen up”) her primary weapon is a bow, she was given Oliver’s quiver. I don’t know how many more anvils needed to be dropped, but people are still doubting this? Is it because she’s a woman? Because I’m getting really tired of seeing spec of the next GA being a man (Connor, William, rando unknown guy) when the show has practically held up a big flashy green arrow and pointed it at Mia.