It starts back in October (probably the 12th, as it always starts the same weekend of the New York Comic-Con).
They usually release a trailer at San Diego Comic-Con (so somewhere between July 24th & July 27th, she should get a first look at S5). Not sooner, because they just started to film like a week and a half ago.
Season five comes out around October. I don't know exactly when but if あなた look up season 5 on utube I belive there is a promo and a trailer out for it, and sorry if I'm incorrect on either subjects
