They were going through all the great world champions of the past on both the WWE and NWA/WCW side of the table. Almost impossible not to mention Sting, although as memory serves, they completely ignored mentioning him really at all on the Monday Night Wars and The Rise And Fall Of WCW DVDs. Pretty sure it doesn't mean anything, though who knows.
I don't really care to see Sting in WWE anymore. The last great time for him to jump would have been sometime around 2001-2004 and that time is long past.