Actually, SuperBrawl the month before was the big number. Then, they started teasing a Flair heel turn and Hogan face turn, which killed the drawing power both of them had left in WCW, as fans preferred the opposite. They tried Hogan vs Flair many times on PPV after that, but it never drew again.
By early 1999, the company was already on a downswing and they still produced that monster buyrate. Flair's promos in the lead-up were outstanding and what we never got to see from him in Hogan feuds before -- talk that real wrestling fans knew the difference between the two, and not to train for a big media appearance, but rather for the fight of his life. He then said while Hogan was the bigger celebrity, Flair was the better wrestler and he would tie him in knots. Hogan vs Flair with similar build during WCW's height might have set a record.