호흡 (breath) hear means collaboration, ensemble performance, and the like. It comes from the expression 호흡을 맞추다, literally "adapt one's breathing with a partner for a duet". Applying this sense of 호흡, "벌써부터 환상의 호흡 예고하다" would be "It already shows signs of a fantastic collaboration", "It bodes well early on for a fantastic collaboration". or "It shows early promises of a fantastic collaboration".