The Invasion (professional wrestling)
After The Alliance was disbanded, the WCW World Heavyweight Championship would be simply renamed the World Championship, and later unified with the WWF Championship to form the WWF Undisputed Championship.  The Undisputed Championship was originally represented with both the original WWF and WCW title belts, as the champion would carry both belts around, until being replaced with a single belt.  At the beginning of the WWE Brand Extension, the champion would appear on both RAW and SmackDown! until then champion Brock Lesnar took the title to Smackdown.  Eric Bischoff would reward Triple H with the former WCW championship belt, as he was the last person to have it, renaming it the World Heavyweight Championship.  The Undisputed Championship would be renamed the WWE Championship, as having two world titles contradicted the term "undisputed."