Complex sentence: Ric Flair was the first WCW International World Heavyweight Champion, already holding the title when it was renamed--he had been booked to defeat Barry Windham for the then-NWA World Heavyweight Championship in July 1993.
Split into simpler sentences: Ric Flair was the first WCW International World Heavyweight Champion; he already held the title when it was renamed. He had been booked to defeat Barry Windham for the then-NWA World Heavyweight Championship in July 1993.