I was never a Korn fan, but I think its a good idea.
The band touring with any big 90s band would be huge, provided that the other band would not headline. A good example would be Goldfinger, who attract sell-out crowds even today.
I don't know about your corner of the globe, but by me 90s shows are all the rage. As the 80s babies who grew up on 90s music, turn into 30somethings with disposable income, they flock to nostalgic shows.