Simplify the following text for a Grade 13 native English-speaking person.
Original: 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 .
Simplified: First , the WCW World Heavyweight Championship ( simply renamed the World Championship ) was unified with the WWF Championship to form the WWF Undisputed Championship .