Halloween Havoc 98, you had 3 main event build-ups over months (Hall / Nash, Warrior / Hogan, and Hart / Sting) and DDP / Goldberg being built in a month. A lot of hype but unfortunately it didn't delivered mostly because of the outcomes of the matches plus Warrior / Hogan II sucking unlimited amount of ass. Page / Goldberg still remains a WCW classic to me up to this very day and the only one out of the 4 that delivered.
Starrcade 98 mainly because of Goldberg / Nash which I felt delivered even if many didn't like the outcome. Hey I hated Goldberg so it was a blessing for me.