WWE was lucky enough to hire the most notable names in WCW once they bought the company. When WCW folded in 2001, many talents were able to work for WWE almost immediately, taking part in the Alliance Invasion angle. Others like the nWo would take another year before making the jump. Some like Sting took more than a decade to finally do so.

https://screenrant.com/best-wcw-wrestlers-never-wrestled-wwe/